نتایج جستجو برای: hydrologic engineering centre hydrologic modeling system hec hms
تعداد نتایج: 2784980 فیلتر نتایج به سال:
The land use change is one of the major challenges of the human communities in this century and even more its impacts are than the climate change phenomenon. Land use change influences run-off as well as the other hydrologic factors such as interception, infiltration and the flood intensity. This study is aimed to investigate the impact of last 30 years of land use changes on hydrological behav...
The Ciciriello catchment is a 3 km2 drainage sub-basin of the Bussento river basin, located in southern part Campania Region (Southern Italy). Since 2012, this has been studied using an interdisciplinary approach—geomorphological, hydrogeological, and hydrological—and hydro-chemical monitoring system. Following previous research, aim paper to calibrate, on catchment, hydrologic parameters for w...
This paper develops a framework for regional scale flood modeling that integrates NEXRAD Level III rainfall, GIS, and a hydrological model (HEC-HMS/RAS). The San Antonio River Basin (about 4000 square miles, 10,000 km2) in Central Texas, USA, is the domain of the study because it is a region subject to frequent occurrences of severe flash flooding. A major flood in the summer of 2002 is chosen ...
While the process of modeling and mapping a 100-year floodplain is inherently full of uncertainty, engineers are still required to determine a single line boundary for flood insurance rate and other floodplain studies. This is despite the fact that a good engineer knows that, within reasonable limits, different modeling parameters can be chosen that result in shifting the floodplain boundary ei...
A geographic information system ~GIS! based approach is presented for the development of a terrain model based on stream channel representation of the U. S. Army Corps of Engineers Hydrologic Engineering Center’s River Analysis System ~HEC-RAS! hydraulic model. As input, the approach requires a completed HEC-RAS simulation, a digital elevation model ~DEM!, and a GIS representation of the stream...
River flow assessments and ecologically sustainable water management plans are now possible due to the advancement of sophisticated computer models. The US Army Corps Engineers developed HEC-HMS model, which can be used for various hydrological simulations. Rainfall-runoff modeling aids in estimating peak flows, is critical resource planning. On December 18, 2017, a heavy rainfall event ungauge...
In order to understand the hydrological impacts of nature-based solutions in Cantareira Water Supply System, this study evaluates six different land cover and use change scenarios. The first second consider restoration native vegetation riparian areas, third prioritizes sites using biophysical characteristics (optimized scenario derived from Resource Investment Optimization System—RIOS), fourth...
A mixed-model moving-average approach to geostatistical modeling in stream networks. Ecology 91:644–651. A distance matrix that contains the hydrologic distance between any two sites in a study area is needed to fit a geostatistical model using the tail-up and tail-down autocovariance functions. However, the hydrologic distance information needed to model the covariance between flow-connected a...
The objective of this paper is to show that the structure of the spatiotemporal continuum has important implications in practical stochastic hydrology (e.g., geostatistical analysis of hydrologic sites) and is not merely an abstract mathematical concept. We propose that the concept of physical geometry as a spatiotemporal continuum with properties that are empirically de®ned is important in hyd...
Joshua Peschel, Texas A&M University JOSHUA M. PESCHEL is a PhD student in Civil Engineering at Texas A&M University. He received the BS in Biological Systems Engineering and the MS in Biological & Agricultural Engineering, also from Texas A&M. His current research interests include unsaturated soil water transport, spatially-distributed hydrologic modeling, and emerging technologies in enginee...
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