"Hydrologic Response Using the SWAT (Soil and Water Assessment Tool) Mo" by Hector Eliezer Mayorga
 

Document Type

Thesis

Degree

Master of Science (MS)

Major/Program

Civil Engineering

First Advisor's Name

Arturo Leon

First Advisor's Committee Title

committee chair

Second Advisor's Name

Hector R. Fuentes

Second Advisor's Committee Title

committee member

Third Advisor's Name

Ali Ebrahimian

Third Advisor's Committee Title

committee member

Keywords

Hydrologic Response, SWAT, Climate Change, Land Change, Hydrologic Modelling

Date of Defense

6-30-2023

Abstract

This thesis assesses the impacts of climate and land use changes on hydrological responses in the Mayales Watershed by applying the Soil and Water Assessment Tool (SWAT) model for streamflow generation. Located in Nicaragua, the study watershed covers an extensive area of 894 km2, characterized predominantly by its main land use of Range Grasses. The model was calibrated and validated using monthly historical streamflow records from 1990 to 2008. Six future climate and land use scenarios were simulated using regional projections obtained from local agencies. The findings revealed that under Scenario #6 (precipitation decreasing, temperature rising, and land use change), the watershed system responded with a significant decrease in water yield, percolation, and surface runoff by about 62%, 48%, and 56%, respectively. Additionally, there was a rising in evapotranspiration of approximately 21%. The results will support the identification of appropriate adaptation strategies and sustainable water resource regulation.

Identifier

FIDC011212

ORCID

0000-0001-5615-7419

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