PURPOSE: The purpose of this System-Wide Water Resources (SWWRP) technical note is to describe the application of the Gridded Surface Subsurface Hydrologic Analysis (GSSHA) model at the Goodwin Creek Experimental Watershed (GCEW). The purpose of applying the model at this site was to confirm that the hydrologic portions of the code were working properly and were able to achieve accurate results...

INTRODUCTION: EDYS (Ecological DYnamics Simulation Model) is a general ecosystem simulation model that is mechanistically based and spatially explicit (Childress and McLendon 1999; Childress et al. 1999, 2002). The model simulates natural and anthropogenic-induced changes in plant, soil, animal, and watershed components across landscapes, at spatial scales ranging from 1 m or less to landscape ...

Abstract. The role of rainfall space–time structure, as well its complex interactions with land surface properties, in flood response remains an open research issue. This study contributes to this understanding, specifically for small (<15 km2) urban watersheds. Using a frequency analysis framework that combines stochastic storm transposition (SST)-based scenarios the physically based distri...

Abstract Distributed modeling approach may have much better performance and accuracy compared with lumped-parameter hydrologic models. The main goals of this research are: investigating the possibility combining distributed hydrological models an one-dimensional hydraulic model simulating waterways in large watersheds limited data. Then performing sensitivity analysis on different parameters or...

According to the United Nations (UN), an additional 1.35 billion people will live in cities by 2030. Well-planned measures are essential for reducing risk of flash floods. Flash floods typically inflict more damage densely populated areas. The province Hail encompasses 120,000 square kilometers, or approximately 6% total land area Kingdom Saudi Arabia. Due its innate physiographic and geologic ...

Urban flooding is a primary concern in all developed areas. Understanding what factors contribute to the magnitude and frequency of flooding is of primary importance when designing an engineering system to mitigate flooding. To understand the effect of impervious area versus the role of the storm drainage system in urban flooding, the U.S. Army Corps of Engineers Gridded Surface Subsurface Hydr...

This article describes some of the capabilities encapsulated within the Model Independent Calibration and Uncertainty Analysis Toolbox (MICUT), which was written to support the popular PEST model independent interface. We have implemented a secant version of the Levenberg–Marquardt (LM) method that requires far fewer model calls for local search than the PEST LM methodology. Efficiency studies ...

A physically-based, distributed-parameter hydrologic model was used to simulate a recent flood event in the city of Hafr Al Batin, Saudi Arabia to gain a better understanding of the runoff generation and spatial distribution of flooding. The city is located in a very arid catchment. Flooding of the city is influenced by the presence of three major tributaries that join the main channel in and a...

Population growth and land use modification in urban areas require the of accurate tools for rainfall-runoff modeling, especially where topography is complex. The recent improvement quality resolution remotely sensed precipitation satisfies a major need such tools. A physically-based, fully distributed hydrologic model conceptual semi-distributed model, forced by satellite rainfall estimates, w...