<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>2007-2422</journal-id>
<journal-title><![CDATA[Tecnología y ciencias del agua]]></journal-title>
<abbrev-journal-title><![CDATA[Tecnol. cienc. agua]]></abbrev-journal-title>
<issn>2007-2422</issn>
<publisher>
<publisher-name><![CDATA[Instituto Mexicano de Tecnología del Agua, Coordinación de Comunicación, Participación e Información]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-24222015000600049</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Groundwater Vulnerability Mapping in Two Watersheds Affected by Yacyreta Dam in Paraguay]]></article-title>
<article-title xml:lang="es"><![CDATA[Mapeo de la vulnerabilidad del agua subterránea en dos cuencas afectadas por la represa Yacyreta en Paraguay]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Musálem]]></surname>
<given-names><![CDATA[Karim]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[McDonald]]></surname>
<given-names><![CDATA[Morag]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Jiménez]]></surname>
<given-names><![CDATA[Francisco]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Laino]]></surname>
<given-names><![CDATA[Rafaela]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Tropical Higher Education and Research Center  ]]></institution>
<addr-line><![CDATA[Turrialba ]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Bangor University School of Environment, Natural Resources and Geography ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>United Kingdom</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Tropical Higher Education and Research Center  ]]></institution>
<addr-line><![CDATA[Turrialba ]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,El Colegio de la Frontera Sur  ]]></institution>
<addr-line><![CDATA[San Cristóbal de las Casas Chiapas]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2015</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2015</year>
</pub-date>
<volume>6</volume>
<numero>6</numero>
<fpage>49</fpage>
<lpage>61</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-24222015000600049&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-24222015000600049&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-24222015000600049&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: Groundwater vulnerability mapping was conducted for two intensive agriculture and urban watersheds draining to the Yacyreta Dam in Paraguay. Two widely used overlaying methods (GOD and DRASTIC) were applied and compared to determine groundwater vulnerability to contamination. Possible effects of climate change on vulnerability values were also assessed using climate change scenarios provided by third authors. Finally, the possible effects of water table variations derived from Yacyreta Dam operations was projected on groundwater vulnerability. Determination of groundwater vulnerability using DRASTIC shows a 56% of the area of the watersheds to be classified as "medium high" (DRASTIC index 140 - 159) and a 22% as either "high", "very high" or "maximum" (DRASTIC index values 160 - &gt; 200). GOD on the other hand showed a 96% of the area of the watersheds with a "moderate vulnerability" to contaminants (values 0.3-0.5) and a 4% of "high vulnerability" (values 0.51 - 0.6). Vulnerability classes remained the same regardless of any climate change scenarios reviewed, for a 100 year span. Operation by the dam, specifically a five meter elevation of the water table scenario, suggests an increase in vulnerability in lower parts of the watersheds. Finally we compare GOD and DRASTIC models and their suitability regarding the available data for the region and scenario building.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: Se condujo un mapeo de vulnerabilidad del agua subterránea en dos cuencas hidrográficas de agricultura intensiva y áreas urbanas que drenan al embalse Yacyreta en Paraguay. Se aplicaron y compararon dos métodos de sobreposición ampliamente utilizados (GOD y DRASTIC) para determinar la vulnerabilidad del agua subterránea a la contaminación. También se evaluaron los posibles efectos del cambio climático en los valores de vulnerabilidad utilizando escenarios de cambio climático de terceros autores. Por último, se proyectaron los posibles efectos en la vulnerabilidad derivados de las variaciones en el nivel freático, producto de las operaciones de la represa Yacyreta. La determinación de la vulnerabilidad del agua subterránea utilizando DRASTIC mostró un 56% del área de las cuencas clasificadas como de "media alta" vulnerabilidad (índice DRASTIC 140 - 159) y un 22%, ya sea como "alta", "muy alta" o "máxima" (índice DRASTIC 160 - &gt; 200). GOD, por otro lado, mostró un 96% del área de las cuencas como de "vulnerabilidad moderada" a la contaminación (valores 0.3-0.5) y un 4% como "alta vulnerabilidad" (valores 0.51-0.6). Las clases de vulnerabilidad se mantuvieron iguales sin importar los escenarios de cambio climático revisados, para un periodo de cien años. Las operaciones de la represa, en específico un escenario de elevación del nivel freático de cinco metros, sugiere un aumento en la vulnerabilidad a la contaminación en las partes bajas de las cuencas. Por último, se compararon los modelos GOD y DRASTIC, y su adaptabilidad a los datos disponibles para la región y la construcción de escenarios.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[DRASTIC model]]></kwd>
<kwd lng="en"><![CDATA[GOD model]]></kwd>
<kwd lng="en"><![CDATA[Guarani Aquifer System]]></kwd>
<kwd lng="en"><![CDATA[climate change]]></kwd>
<kwd lng="es"><![CDATA[modelo DRASTIC]]></kwd>
<kwd lng="es"><![CDATA[modelo GOD]]></kwd>
<kwd lng="es"><![CDATA[Sistema Acuífero Guaraní]]></kwd>
<kwd lng="es"><![CDATA[cambio climático]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Agüero]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Pujol]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
</person-group>
<source><![CDATA[Análisis de vulnerabilidad a la contaminación de una sección de los acuíferos del Valle Central de Costa Rica (Vulnerability Analysis to Pollution in the Valle Central Aquifers in Costa Rica)]]></source>
<year>2002</year>
<publisher-loc><![CDATA[San José, Costa Rica ]]></publisher-loc>
<publisher-name><![CDATA[Universidad de Costa Rica]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B2">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Aller]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
<name>
<surname><![CDATA[Bennett]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
<name>
<surname><![CDATA[Lehr]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Petty]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Hacket]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
</person-group>
<source><![CDATA[DRASTIC: A Standardized System for Evaluating Groundwater Pollution Potential Using Hydrogeologic Settings]]></source>
<year>1987</year>
<publisher-loc><![CDATA[Dublin, USA ]]></publisher-loc>
<publisher-name><![CDATA[Environment Protection Agency]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B3">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Auge]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<source><![CDATA[Interrelación embalse Yacyretá - sistema del Iberá: evaluación de la información existente y propuesta de nuevas investigaciones]]></source>
<year>2001</year>
<publisher-loc><![CDATA[La Plata ]]></publisher-loc>
</nlm-citation>
</ref>
<ref id="B4">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[A GIS-Based DRASTIC Model for Assessing Aquifer Vulnerability in Kakamigahara Heights, Gifu Prefecture, Central Japan]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Babiker]]></surname>
<given-names><![CDATA[I. S.]]></given-names>
</name>
<name>
<surname><![CDATA[Mohamed]]></surname>
<given-names><![CDATA[A. A. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Hiyama]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
<name>
<surname><![CDATA[Kato]]></surname>
<given-names><![CDATA[K.]]></given-names>
</name>
</person-group>
<source><![CDATA[Science of the Total Environment]]></source>
<year>2005</year>
<volume>345</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>27-140</page-range></nlm-citation>
</ref>
<ref id="B5">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bergkamp]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Orlando]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
<name>
<surname><![CDATA[Burton]]></surname>
<given-names><![CDATA[I.]]></given-names>
</name>
</person-group>
<source><![CDATA[Change: Adaptation of Water Management to Climate Change]]></source>
<year>2003</year>
<publisher-loc><![CDATA[Gland and Cambridge ]]></publisher-loc>
<publisher-name><![CDATA[UICN]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B6">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Cabral]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<source><![CDATA[Uso sustentable del Sistema Acuífero Guarani (Sustainable use of the Guarani Aquifer System)]]></source>
<year>2005</year>
<publisher-loc><![CDATA[Asunción, Paraguay ]]></publisher-loc>
<publisher-name><![CDATA[SAG-PY]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B7">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Vulnerabilidad del agua subterránea a la contaminación en el estado de Yucatán (Groundwater vulnerability to pollution in Yucatan State)]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ceballos]]></surname>
<given-names><![CDATA[R. P.]]></given-names>
</name>
<name>
<surname><![CDATA[Avila]]></surname>
<given-names><![CDATA[J. P.]]></given-names>
</name>
</person-group>
<source><![CDATA[Ingeniería Revista Académica]]></source>
<year>2004</year>
<volume>8</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>33-42</page-range></nlm-citation>
</ref>
<ref id="B8">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Comprehensive Approach of Groundwater Resource Evaluation: A Case Study in the Chippewa Creek Watershed in Ohio]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Chowdhury]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Iqbal]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Szabo]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<source><![CDATA[Ohio Journal of Science]]></source>
<year>2003</year>
<volume>103</volume>
<numero>5</numero>
<issue>5</issue>
<page-range>134-42</page-range></nlm-citation>
</ref>
<ref id="B9">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Clay]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<source><![CDATA[World Agriculture and the Environment: A Commodity to Commodity Guide to Impacts and Practice]]></source>
<year>2004</year>
<publisher-loc><![CDATA[Washington, DC ]]></publisher-loc>
<publisher-name><![CDATA[Island Press-World Wildlife Fund]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B10">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Groundwater Protection Using Vulnerability Maps and Wellhead Protection Area (WHPA): A Case Study in Mexico]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Exposito]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Esteller]]></surname>
<given-names><![CDATA[M. V.]]></given-names>
</name>
<name>
<surname><![CDATA[Paredes]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Rico]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Franco]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
</person-group>
<source><![CDATA[Water Resources Management]]></source>
<year>2010</year>
<volume>24</volume>
<numero>15</numero>
<issue>15</issue>
<page-range>4219-36</page-range></nlm-citation>
</ref>
<ref id="B11">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Fariña]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
</person-group>
<source><![CDATA[Environmental Protection and Sustainable Development of the Guaraní Aquifer System]]></source>
<year>2009</year>
<volume>2</volume>
<publisher-loc><![CDATA[Asunción, Paraguay ]]></publisher-loc>
<publisher-name><![CDATA[SAG- PY Geology and Hydrogeology]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B12">
<nlm-citation citation-type="confpro">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Fariña]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Vassolo]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Cabral]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
<name>
<surname><![CDATA[Vera]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Jara]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
</person-group>
<source><![CDATA[Caracterización hidrogeológica e hidrogeoquímica del Sistema Acuífero Guaraní]]></source>
<year>2004</year>
<conf-name><![CDATA[ XIIICongreso Brasileño de Águas Subterráneas]]></conf-name>
<conf-loc>Cuiaba </conf-loc>
</nlm-citation>
</ref>
<ref id="B13">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Foster]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Hirata]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Gomez]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[D'elia]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Paris]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<source><![CDATA[Groundwater Quality Protection: A Guide for Water Utilities, Municipal Authorities, and Environment Agencies]]></source>
<year>2002</year>
<publisher-loc><![CDATA[Washington, DC ]]></publisher-loc>
<publisher-name><![CDATA[Ed. Groundwater Management Advisory Team (GW MATE)]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B14">
<nlm-citation citation-type="book">
<collab>Global Consultores</collab>
<source><![CDATA[Gestión integrada de las cuencas: visión diagnóstica de los escenarios (Integrated Management of the Mboi Cae and Quiteria Watersheds: Diagnosis of the Watersheds Scenarios)]]></source>
<year>2008</year>
<publisher-loc><![CDATA[Encarnación, Paraguay ]]></publisher-loc>
<publisher-name><![CDATA[Entidad Binacional Yacyreta (EBY)]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B15">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Current Trends and Future Challenges in Groundwater Vulnerability Assessment Using Overlay and Index Methods]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Gogu]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Dassargues]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<source><![CDATA[Environmental Geology]]></source>
<year>2000</year>
<volume>39</volume>
<numero>6</numero>
<issue>6</issue>
<page-range>549-59</page-range></nlm-citation>
</ref>
<ref id="B16">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Gonzalez]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
</person-group>
<source><![CDATA[Proyecto Piloto Itapúa-Paraguay: Proyecto de Protección Ambiental y Desarrollo Sostenible del Sistema Acuífero Guaraní (Pilot Project Itapúa-Paraguay: Environmental Protection and Sustainable Development of the Guarani Aquifer System Project)]]></source>
<year>2005</year>
<publisher-name><![CDATA[Unedited, Unpublished. Environmental Secretariat of Paraguay (SEAM)]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B17">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Külls]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
</person-group>
<source><![CDATA[Groundwater Recharge of the Guarani Aquifer. Previous Investigations, Estimation Methods and Recommendations]]></source>
<year>2003</year>
<publisher-loc><![CDATA[Sao Paulo ]]></publisher-loc>
<publisher-name><![CDATA[Instituto Geologico]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B18">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Index-Based Groundwater Vulnerability Mapping Models Using Hydrogeological Settings: A Critical Evaluation]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Kumar]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<name>
<surname><![CDATA[Bansod]]></surname>
<given-names><![CDATA[B. K. S.]]></given-names>
</name>
<name>
<surname><![CDATA[Debnath]]></surname>
<given-names><![CDATA[S. K.]]></given-names>
</name>
<name>
<surname><![CDATA[Thakur]]></surname>
<given-names><![CDATA[P. K.]]></given-names>
</name>
<name>
<surname><![CDATA[Ghanshyam]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
</person-group>
<source><![CDATA[Environmental Impact Assessment Review]]></source>
<year>2015</year>
<volume>51</volume>
<page-range>38-49</page-range></nlm-citation>
</ref>
<ref id="B19">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[GIS Based Assessment of Groundwater Vulnerability Using Drastic Model]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Kumar]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Thirumalaivasan]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[Radhakrishnan]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
</person-group>
<source><![CDATA[Arabian Journal for Science and Engineering]]></source>
<year>2014</year>
<volume>39</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>207-16</page-range></nlm-citation>
</ref>
<ref id="B20">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Laino]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
</person-group>
<source><![CDATA[Manejo del recurso hídrico en la cuenca del arroyo Capiibary: implicaciones para la gestión ambiental del acuífero Guaraní (Management of Water Resources in the Watershed of the Capiibary Eiver: Implications for the Environmental Development of the Guarani Aquifer)]]></source>
<year>2005</year>
<publisher-loc><![CDATA[Cartago, Costa Rica ]]></publisher-loc>
<publisher-name><![CDATA[Tropical Agricultural Research and Higher Education Center]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B21">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Manejo del recurso hídrico y vulnerabilidad a la contaminación del acuífero Guaraní en la cuenca del arroyo Capiibary, Paraguay (Management Water Resources and Pollution Vulnerability of the Guarani Aquifer in the Watershed of the Capiibary River)]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Laino]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Jiménez]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
<name>
<surname><![CDATA[Velazquez]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Paez]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Casanoves]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
</person-group>
<source><![CDATA[Recursos Naturales y Ambiente]]></source>
<year>2006</year>
<volume>48</volume>
<page-range>65-74</page-range></nlm-citation>
</ref>
<ref id="B22">
<nlm-citation citation-type="confpro">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Larroza]]></surname>
<given-names><![CDATA[F. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Fariña]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Baez]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Cabral]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
</person-group>
<source><![CDATA[Evaluación hidrogeológica y protección a la contaminación del agua subterránea en la reserva de la Biosfera del Bosque Maracayu (RBBMb) Límite Paraguay-Brasil]]></source>
<year>2005</year>
<conf-name><![CDATA[ IISimposio de Hidrogeología do Sudeste]]></conf-name>
<conf-date>4-7 de octubre, 2005</conf-date>
<conf-loc>Sao Paulo </conf-loc>
</nlm-citation>
</ref>
<ref id="B23">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Vulnerability and Risk Evaluation of Agricultural Nitrogen Pollution for Hungary's Main Aquifer Using DRASTIC and GLEAMS Models]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Leone]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Ripa]]></surname>
<given-names><![CDATA[M. N.]]></given-names>
</name>
<name>
<surname><![CDATA[Uricchio]]></surname>
<given-names><![CDATA[V.]]></given-names>
</name>
<name>
<surname><![CDATA[Deak]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Vargay]]></surname>
<given-names><![CDATA[Z.]]></given-names>
</name>
</person-group>
<source><![CDATA[Journal of Environmental Management]]></source>
<year>2009</year>
<volume>90</volume>
<numero>10</numero>
<issue>10</issue>
<page-range>2969-78</page-range></nlm-citation>
</ref>
<ref id="B24">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Limia]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<source><![CDATA[Construcción de escenarios de cambio climático para Paraguay (Construction of Climate Change Scenarios for Paraguay)]]></source>
<year>2000</year>
<publisher-loc><![CDATA[Asunción, Paraguay ]]></publisher-loc>
<publisher-name><![CDATA[Programa Nacional de Cambio Climático. Dirección de Ordenamiento Ambiental, Subsecretaria de Recursos Naturales y Ambiente , Ministerio de Agricultura y Ganadería]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B25">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Groundwater Vulnerability Assessment in Portugal]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Lobo-Ferreira]]></surname>
<given-names><![CDATA[J. P.]]></given-names>
</name>
<name>
<surname><![CDATA[Oliveira]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<source><![CDATA[Geofísica Internacional]]></source>
<year>2004</year>
<volume>43</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>541-50</page-range></nlm-citation>
</ref>
<ref id="B26">
<nlm-citation citation-type="book">
<collab>Lotti-Associatti</collab>
<source><![CDATA[Estudio hidrogeológico, topográfico y geotécnico del área de Posadas, Garupa y Encarnación (Hydrogeological, topographical and geotechnical study of Posadas, Garupa and Encarnación). Executive Summary]]></source>
<year>1999</year>
<publisher-loc><![CDATA[Rome ]]></publisher-loc>
<publisher-name><![CDATA[Yacyreta Binational Entity]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B27">
<nlm-citation citation-type="book">
<collab>Military Geographic Institute Paraguay</collab>
<source><![CDATA[Vector files]]></source>
<year>1986</year>
<publisher-loc><![CDATA[Asunción, Paraguay ]]></publisher-loc>
<publisher-name><![CDATA[Military Geographic Institute]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B28">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Musálem]]></surname>
<given-names><![CDATA[K.]]></given-names>
</name>
</person-group>
<source><![CDATA[Assessing Integrated Watershed Management and Spatial Groundwater Vulnerability in Priority Watersheds of the Yacyreta Dam in Paraguay]]></source>
<year>2010</year>
<publisher-loc><![CDATA[Turrialba, Costa Rica, Bangor, USA ]]></publisher-loc>
<publisher-name><![CDATA[Bangor University, Tropical Agricultural Research and Higher Education Center]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B29">
<nlm-citation citation-type="">
<article-title xml:lang=""><![CDATA[Single-Parameter Sensitivity Analysis for Aquifer Vulnerability Assessment Using DRASTIC and SINTACS]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Napolitano]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<name>
<surname><![CDATA[Fabbri]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<source><![CDATA[HydroGIS 96: Application of Geographic Information Systems in Hydrology and Water Resouces Management: Proceedings of the Vienna Conference]]></source>
<year>1996</year>
<page-range>559-66</page-range></nlm-citation>
</ref>
<ref id="B30">
<nlm-citation citation-type="book">
<collab>National Research Council</collab>
<source><![CDATA[Contamination Potential under Conditions of Uncertainty]]></source>
<year>1993</year>
<publisher-loc><![CDATA[Washington, DC ]]></publisher-loc>
<publisher-name><![CDATA[Committee on Techniques for Assessing Ground Water Vulnerability]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B31">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Obando]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
</person-group>
<source><![CDATA[Situación del recurso hídrico subterráneo de la subcuenca del río Aguas Calientes, Nicaragua (Undeground Water Resources Situation of the Aguas Calientes River Watershed, Nicaragua)]]></source>
<year>2005</year>
<publisher-loc><![CDATA[Cartago, Costa Rica ]]></publisher-loc>
<publisher-name><![CDATA[Tropical Agricultural Research and Higher Education Center (CATIE)]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B32">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Oporto]]></surname>
<given-names><![CDATA[O.]]></given-names>
</name>
<name>
<surname><![CDATA[Vassolo]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
</person-group>
<source><![CDATA[Aguas subterráneas-El acuífero Guaraní (Groundwater-Guarani Aquifer)]]></source>
<year>2003</year>
<publisher-loc><![CDATA[Asunción, Paraguay ]]></publisher-loc>
<publisher-name><![CDATA[Dirección General de Protección y Conservación de los Recursos Hídricos, Secretaría del Ambiente (SEAM)]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B33">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Evaluation of Soil Temperature Effect on Herbicide Leaching Potential into Groundwater in the Brazilian Cerrado]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Paraíba]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
<name>
<surname><![CDATA[Cerdeira]]></surname>
<given-names><![CDATA[A. L.]]></given-names>
</name>
<name>
<surname><![CDATA[Silva]]></surname>
<given-names><![CDATA[E. F.]]></given-names>
</name>
<name>
<surname><![CDATA[Martins]]></surname>
<given-names><![CDATA[J. S.]]></given-names>
</name>
<name>
<surname><![CDATA[Coutinho]]></surname>
<given-names><![CDATA[H. L. C.]]></given-names>
</name>
</person-group>
<source><![CDATA[Chemosphere]]></source>
<year>2003</year>
<volume>53</volume>
<numero>9</numero>
<issue>9</issue>
<page-range>1087-95</page-range></nlm-citation>
</ref>
<ref id="B34">
<nlm-citation citation-type="book">
<collab>QGIS Development Team</collab>
<source><![CDATA[QGIS Geographic Information System]]></source>
<year>2009</year>
<publisher-loc><![CDATA[Delaware ]]></publisher-loc>
<publisher-name><![CDATA[Open Source Geospatial Foundation]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B35">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Quevauviller]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
</person-group>
<source><![CDATA[Groundwater Science and Policy: An International Overview]]></source>
<year>2008</year>
<publisher-loc><![CDATA[London ]]></publisher-loc>
<publisher-name><![CDATA[Royal Society of Chemistry]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B36">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[A GIS Based DRASTIC Model for Assessing Groundwater Vulnerability in Shallow Aquifer in Aligarh, India]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rahman]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<source><![CDATA[Applied Geography]]></source>
<year>2008</year>
<volume>28</volume>
<page-range>32-53</page-range></nlm-citation>
</ref>
<ref id="B37">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rupert]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<source><![CDATA[Improvements to the DRASTIC Ground-Water Vulnerability Mapping Method]]></source>
<year>1999</year>
<publisher-loc><![CDATA[Boise, USA ]]></publisher-loc>
<publisher-name><![CDATA[USGS Fact Sheet, Geological Survey]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B38">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Schmidt]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
</person-group>
<source><![CDATA[Uso sostenible del sistema acuífero Guaraní en la región oriental del Paraguay (Sustainable use of the Guaraní Aquifer System in Eastern Region of Paraguay)]]></source>
<year>2009</year>
<volume>1</volume>
<publisher-loc><![CDATA[Hannover y Asuncion, Paraguay ]]></publisher-loc>
<publisher-name><![CDATA[BGR and Paraguayan Environment Secretariat (SEAM) SAG-PY]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B39">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[A Study of Groundwater Pollution Vulnerability using DRASTIC/GIS, West Bengal, India]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Shahid]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
</person-group>
<source><![CDATA[Journal of Environmental Hydrology]]></source>
<year>2000</year>
<volume>8</volume>
<page-range>9</page-range></nlm-citation>
</ref>
<ref id="B40">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Vignola]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
</person-group>
<source><![CDATA[Fortalecimiento de instrumentos decisionales para la provisión de agua para consumo humano en El Salvador]]></source>
<year>2005</year>
<publisher-loc><![CDATA[Cartago, Costa Rica ]]></publisher-loc>
<publisher-name><![CDATA[Tropical Agricultural Research and Higher Education Center]]></publisher-name>
</nlm-citation>
</ref>
</ref-list>
</back>
</article>
