INFORME FINAL EVALUACIÓN REGIONAL DEL AGUA - ERA

This technical report presents a Regional Water Evaluation (ERA) for the Corpochivor jurisdiction in Colombia, utilizing the WEAP modeling system. The evaluation identifies a general lack of water retention capacity across the region and highlights critical water pressure and vulnerability in the upper basin, particularly in the Úmbita municipality. Findings indicate a deteriorating trend in water quality in main river channels and a discrepancy between official water concessions and potential agricultural demand. The report provides a framework for prospective water management under climate change and population growth scenarios.

• The jurisdiction of Corpochivor exhibits a generally very low capacity to retain and regulate soil moisture. Out of the analyzed micro-basins, 196 are categorized as 'Very Low' and 5 as 'Low' for the Water Retention and Regulation Index (IRH), with the steep relief identified as the primary influencing factor.
• Surface water pressure (IUA) is generally low to very low, but increases significantly in the upper part of the jurisdiction. Micro-basin 3507 08 03, near Úmbita, shows the highest pressure ('Very High'), likely due to a surface-water-fed irrigation district.
• Analysis of water quality trends since 2001 indicates that the quality of water in the main river channels is deteriorating. The Water Quality Index (ICA) shows that water quality is acceptable in the upper basin but deteriorates to 'regular' upon reaching the Garagoa River and reaches 'bad' categories further downstream.
• The Potential Demand scenario reveals that the corporation may be underestimating water demands in micro-basins with agricultural vocations, suggesting that actual extractions for livestock and agriculture may exceed those officially reported through concessions.
• Vulnerability to water shortages (IVH) is generally 'Medium' across the area due to low water retention capacity. However, micro-basins in the upper Garagoa sub-zone (specifically 3507 08 03, 3507 05 04-06, and 3507 02 04) exhibit 'High' to 'Very High' vulnerability, which worsens during dry hydrological years.
• Micro-basin 3507 08 03, located in the municipality of Úmbita, is identified as the highest priority for management and planning because it performs poorly across almost all regional water indicators, falling into critical ranges for most.
• The Potential Alteration of Water Quality Index (IACAL) is 'Very High' in a large percentage of the basin, particularly in highly intervened upper basin areas where diffuse discharges from crops and pastures are likely causing high contamination.

APA

-1, Santos, T. F., Pérez, C. F., Lima, N., Cusguen, L., & Angarita, H. A. (2020). INFORME FINAL EVALUACIÓN REGIONAL DEL AGUA - ERA. Stockholm Environment Institute. https://www.sei.org/wp-content/uploads/2023/06/informe-final.pdf

Chicago

-1, Tania F. Santos, Cristo F. Pérez, Nilo Lima, Luisa Cusguen, and Héctor A Angarita. INFORME FINAL EVALUACIÓN REGIONAL DEL AGUA - ERA. Stockholm Environment Institute, 2020. https://www.sei.org/wp-content/uploads/2023/06/informe-final.pdf.

Wikipedia

{{cite report |last1=-1 |last2=Santos |first2=Tania F. |last3=Pérez |first3=Cristo F. |last4=Lima |first4=Nilo |last5=Cusguen |first5=Luisa |last6=Angarita |first6=Héctor A |title=INFORME FINAL EVALUACIÓN REGIONAL DEL AGUA - ERA |publisher=Stockholm Environment Institute |date=March 2020 |url=https://www.sei.org/wp-content/uploads/2023/06/informe-final.pdf |access-date=17 August 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{12020informe, author = {-1 and Santos, Tania F. and Pérez, Cristo F. and Lima, Nilo and Cusguen, Luisa and Angarita, Héctor A}, title = {{INFORME FINAL EVALUACIÓN REGIONAL DEL AGUA - ERA}}, institution = {Stockholm Environment Institute}, year = {2020}, month = mar, url = {https://www.sei.org/wp-content/uploads/2023/06/informe-final.pdf}, urldate = {2026-08-17}, note = {Indexed by Climate Insights Directory} }