Project Number: 6408-13000-023-52
Start Date: Feb 01, 2014
End Date: Mar 31, 2018
The overall approach combines fieldwork with modeling to construct a water and sediment budget of the Goat Canyon watershed in cooperation with the U.S. Environmental Protection Agency (USEPA), USDA Agricultural Research Service (ARS), San Diego State University (SDSU), and the Center of Scientific Investigation and Higher Education in Ensenada (CICESE), Mexico. Specific tasks are: 1) Collect and analyze existing data and relevant information regarding hydrological, erosion and sediment transport processes from the watershed and from the literature (USEPA and SDSU); 2) Perform channel cross section survey and analyze soil properties (Identification of erosive substrates) (ARS, CICESE and SDSU); 3) Compile a database of watershed characteristics describing hydrologic, vegetative, soil, topographic and other features including erosion control structures and conservation measure locations (USEPA and SDSU); 4) Monitor rainfall, and runoff and sediment load at the watershed outlet (CICESE and SDSU); 5) Establish permanent monitoring locations where channel changes would be monitored over time, measured once per year from repeat cross sections and/or using aerial photos from different periods (SDSU and ARS); 6) Quantify gully dimensions using topographic surveys and high resolution Digital Elevation Models (DEMs). The DEMs will be created using either aerial or ground-level stereo pairs taken before and after major rainfall events (SDSU and CICESE); 7) Set up hydrological and erosion models AnnGNPS and CONCEPTS to estimate the flow duration curve, frequency of over-bank flows, and annual total sediment loading by erosion process (sheetwash, rill, gully, channel) from the existing condition of the watershed and after implementation of conservation measures and BMPs (ARS, SDSU, CICESE and USEPA); 8) Compile and analyze information regarding sediment yield reduction from various implementation measures and BMPs (SDSU, CICESE).