An approximate method for partitioning daily streamflow data

Evaluation of the Swat Model on a Coastal Plain Agricultural Watershed

“…For the observed data, total water yield (TWY) was obtained from streamflow measurements. Values for the observed stormflow and baseflow were determined from measured TWY using water budgets established through prior research on the watersheds (Shirmohammadi et al, 1984). Stormflow was assumed to be 35% of the TWY for watershed J.…”

“…As expected, by increasing the depth of water in the shallow aquifer at the beginning of the simulation and decreasing the available storage in the vadose zone, baseflow and TWY were increased. The increase was observed in the first months of the simulation, when the impact of the initial parameter [a] Observed stormflow calculated as 35% of observed total water yield based on data of Shirmohammadi et al (1984). [b] Observed baseflow calculated as 65% of observed total water yield based on data of Shirmohammadi et al (1984).…”

“…This assumption decreased available vadose zone storage in 1997 and 1998, but retained [a] Observed stormflow calculated as 35% of observed total water yield based on data of Shirmohammadi et al (1984). [b] Observed baseflow calculated as 65% of observed total water yield based on data of Shirmohammadi et al (1984). [c] Observed evapotranspiration calculated by difference between precipitation and total water yield.…”

Watershed–scale Simulation of Sediment Andnutrient Loads in Georgia Coastal Plain Streams Using the Annualized Agnps Model

“…Runoff was partitioned from stream flow by a method outlined by Shirmohammadi et al (1984) that was developed for the Little River watershed. Runoff was assumed to occur when rainfall met or exceeded 5 mm in a day.…”

Effect of conservation practices on soil carbon and nitrogen accretion and crop yield in a corn production system in the southeastern coastal plain, United States

“…This relationship may be important in the very sandy, highly erodible soils of the US southeastern coastal plain where temperatures and evaporative water demands are high, soil nutrient and water retention capacities are low, and the frequency of high intensity precipitation events during convective summer thunderstorms and tropical cyclones can lead to severe soil erosion, redeposition, and profile burying within landscapes. The low water and nutrient holding capacities of sandy surface soils in the region underscore the potential importance of subsurface soil characteristics when taken into consideration with previous research demonstrating that heavier textured subsoils of the Tifton loamy sand series have reduced hydraulic conductivity and are believed to restrict rooting depth and deep percolation while inducing lateral subsurface flow (Hubbard et al 1985) that may be as much as 22% of the annual rainfall (Shirmohammadi et al 1984).…”