Building a hydrologic foundation for tropical watershed management

Fuzzy Hydrologic Model in Tropical Watershed

Organic forms dominate hydrologic nitrogen export from a lowland tropical watershed.

Observations of high dissolved inorganic nitrogen (DIN) concentrations in stream water have reinforced the notion that primary tropical rain forests cycle nitrogen (N) in relative excess compared to phosphorus. Here we test this notion by evaluating hydrologic N export from a small watershed on the Osa Peninsula, Costa Rica, where prior research has shown multiple indicators of conservative N c...

Automated Geospatial Watershed Assessment (agwa): a Gis-based Hydrologic Modeling Tool for Watershed Management and Landscape Assessment

The Automated Geospatial Watershed Assessment (AGWA, see: www.tucson.ars.ag.gov/agwa) tool is a GIS interface jointly developed by the USDA-Agricultural Research Service, the U.S. Environmental Protection Agency, the University of Arizona, and the University of Wyoming to automate the parameterization and execution of the Soil Water Assessment Tool (SWAT) and KINEmatic Runoff and EROSion (KINER...

Comparative nalysis of Hydrologic esponses of Tropical Deciduous and Temperate Deciduous Watershed to Climatic Change’ Jo&

-Lmg-term monitoring of ecological and hydrological processes is critical to understanding ecosystem function and responses to anthropogenic and natural disturbances. Much of the world’s knowledge of ecosystem responses to disturbance comes from long-term studies on gaged watersheds. However, there are relatively few long-term sites due to the large cost and commitment required to establish and...

Hydrologic Modeling of a Canal-Irrigated Agricultural Watershed with Irrigation Best Management Practices: Case Study

Simulating irrigation systems by accounting for various water loss rates is necessary while modeling the hydrology of cultivated canal-irrigated watersheds. The existing approaches to modeling canal irrigation use situation-specific optimization procedures. In addition, they are focused on a water management perspective rather than a hydrologic perspective. In this study, an approach is develop...