This paper presents a modeling application of surface runoff using the Hydrologic Modelling System (HEC-HMS). A case study was carried out for the Jianghe watershed, a typical semi-arid and sub-humid geo-climatic region in northern China. Two modeling schemes using different descriptive sub-mechanism models provided by HEC-HMS for runoff volume, direct runoff and routing (channel flow) were inv...

Denitrification and hydrologic leaching are the two major pathways by which nitrogen is lost from the terrestrial biosphere. Humid tropical forests are thought to dominate denitrification from unmanaged lands globally, but there is large uncertainty about the range and key drivers of total N gas emissions across the biome. We combined pantropical measures of small watershed stream chemistry wit...

Abstract The characteristics of the runoff hydropower station are to generate power completely according natural runoff, and output generation change with flow. cluster prediction is conducive improving safety grid operation utilization rate hydropower. This paper analyzes stations, summarizes direction mainstream hydropower, hydrological model represented by Xin'an River model, puts forward a ...

Recommended Citation Mishra, Sudipta Kumar. "Modeling water quantity and quality in an agricultural watershed in the midwestern US using SWAT: assessing implications due to an expansion in 'biofuel' production and climate change. ii To Mom and Dad for your love and support iii Nature shrinks as capital grows. The growth of the market cannot solve the very crisis it creates. ABSTRACT Iowa finds ...

Hydrologic models are essential to watershed planning and management, particularly in the San Antonio River watershed where competition for scarce water resources is a challenge. As a result, the calibration and validation of hydrologic models are essential steps for their successful application. In this study, we examined the use of a loosely coupled genetic algorithm (GA) as an autocalibratio...

Determination of overland sheet flow depths, velocities and celerities across the hillslope in watershed modeling is important towards estimation of surface storage, travel times to streams and soil detachment rates. It requires careful characterization of the flow processes. Similarly, determination of the temporal variation of hillslope-riparian-stream hydrologic connectivity requires estimat...

1798 Although water quality problems associated with agricultural nonpoint source (NPS) pollution have prompted the rapid and widespread adoption of a variety of so called “best management practices” (BMPs), there have been few realistic eff orts to assess their combined eff ectiveness in reducing NPS pollution. Th is study used the Variable Source Loading Function (VSLF) model, a distributed w...