Water becomes, every day, more scarce. Reliable information about volume and quality in each watershed is important to management and proper planning of their use. Data-intensive science is being increasingly needed in this context. Associated analysis processes require handling the drainage network that represents a watershed. This paper presents an ongoing work that explores geographic waters...

The emergence of integrated watershed management (IWM) in several countries throughout the world reflects a growing recognition of the multiple—often competing—uses of water, and the increased awareness of the interrelationships of water systems with other physical and socioeconomic systems. There are many different definitions and descriptions of the concept. Margerum and Born (1995, 377) cont...

For more than two decades, an HSPF-based watershed model has been used to simulate nutrient and sediment load delivery to the Chesapeake Bay. Over time, the watershed model has increased in complexity commensurate with the management challenges in Chesapeake Bay restoration. The increased complexity poses challenges to the standard application of HSPF for efficient operation of the model in a l...

Watershed management is based on the application of models to predict the probable outcome of hypothetical management scenarios. There is enormous variability in the type and complexity of models that are used. In research, the preference is for process-based distributed hydrologic simulation models such as “Distributed Hydrology-Soil-Vegetation Model” (DHSVM, Wigmosta et al., 1994), while the ...

This paper proposes the concept and framework of digital watershed which is divided into three levels such as visual information platform, thematic application system and comprehensive decision-making support system. The construction of distributed hydrology model(DHM) based on digital watershed are discussed. It is shown that digital watershed makes it possible to construct DHM with the real m...

The Cannonsvifle Reservoir watershed is a major component of the unfiltered New York City water suppiy system. The voluntary, incentive-based Watershed Agricultural Program is a collaborative effort among producers, federal, state, and local organizations to address the problem of phosphorus loading effects on water quality through implementation of whole-farm plans. The effectiveness of select...

The results of distributed watershed models could be sensitive to spatial and temporal scales at which inputs and model parameters are aggregated. This paper reports findings of a detailed sensitivity analysis conducted on the U.S. Department of Agriculture’s distributed watershed simulation model, known as the Soil and Water Assessment Tool (SWAT). The Big Creek Watershed, located in southern ...

T paper describes the use of multiple-objective decision analysis to qualitatively and quantitatively assess the quality of an endangered watershed and guide future efforts to improve the quality of the watershed. The Upham Brook Watershed is an urban watershed that lies at the interface of declining inner-city Richmond, Virginia, and growth-oriented Henrico County. A section of stream within t...