Watershed management is a “process of formulation and carrying out of a course of action involving modification of the natural system of watersheds to achieve specified objectives” (Biswas, 2002). Much of watershed management has largely to do with risk assessment and minimizing adverse effects on human populations. To accomplish their specified objectives, professionals in the field of watersh...

Watershed transform is considered to be an important technique in image segmentation. It is the method for image segmentation in the section of mathematical morphology. Work of watershed segmentation proceeds using the neighboring pixels. We present a critical review of several definitions of the watershed transform and the associated sequential algorithms, immersion models and therefore parall...

Watershed transform is considered to be an important technique in image segmentation. It is the method for image segmentation in the section of mathematical morphology. Work of watershed segmentation proceeds using the neighboring pixels. We present a critical review of several definitions of the watershed transform and the associated sequential algorithms, immersion models and therefore parall...

During drinking water treatment, chlorine reacts with total organic carbon (TOC) to form disinfection byproducts (DBP), some of which can be carcinogenic. Additional treatment required to remove TOC before chlorination significantly increases treatment cost. There are two main sources of TOC in a water supply reservoir: (1) the watershed draining to the reservoir, and (2) the internal loading w...

The DHARMA domain-specific middleware system is intended to allow hydrologic field engineers to tackle water-management problems on a scale previously impossible without sophisticated computational management systems. DHARMA provides automatic data acquisition via the Internet; data fusion from online, local, and cached resources; smart caching of intermediate results; parallel process executio...

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 ...

The ability of a watershed model to mimic specified watershed processes is assessed through the calibration and validation process. The Soil and Water Assessment Tool (SWAT) watershed model was implemented in the Beaver Reservoir Watershed of Northwest Arkansas. The objectives were to: (1) provide detailed information on calibrating and applying a multisite and multivariable SWAT model; (2) con...

The DHARMA domain-specific middleware system is intended to allow hydrologic field engineers to tackle water-management problems on a scale previously impossible without sophisticated computational management systems. DHARMA provides automatic data acquisition via the Internet; data fusion from online, local, and cached resources; smart caching of intermediate results; parallel process executio...

A successful experiment with a physical model requires necessary conditions of similarity. This study presents an experimental method with a semi-scale physical model. The model is used to monitor and verify soil conservation by check dams in a small watershed on the Loess Plateau of China. During experiments, the model-prototype ratio of geomorphic variables was kept constant under each rainfa...