Gis-based Hydrological Modeling: a Comparative Study of Hec-hms and the Xinanjiang Model
The last few years have witnessed an enormous study in the area of integrated hydrological modeling with GIS application. In this research, attempt was made to critically look at the application of HEC-GeoHMS which is an extension of ArcView in HEC-HMS; an HEC package which is a new generation of software being developed for rainfall-runoff simulation. The main role of HEC-GeoHMS is to formulate a watershed data structure under the platform of GIS that can be imported directly to HEC-HMS. With the topographic information supplied by HEC-GeoHMS, HEC-HMS works more readily and exactly. The performance of HEC-HMS was compared with that of the Xinanjiang conceptual model using historical flood data from the Wanjiabu catchment in China. The results obtained in the course of this study indicate that HEC-HMS is more convenient for flood stimulation especially in optimizing parameters but not quite accurate as compared with Xinanjiang model. The plausible reason for this could be due to the fact that the Xinanjiang model has more parameters thereby making it flexible to fit a flood event. Based on the results obtained as stated, it is thus suggested that with improvement in data conditions, runoff yield could be calculated on grid format and results for both models appropriately enhanced.
Regional scale flood modeling using NEXRAD rainfall, GIS, and HEC-HMS/RAS: a case study for the San Antonio River Basin Summer 2002 storm event.
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 ...متن کامل
"Technical Report" Flood Hydrograph Simulation Using HEC-HMS Model in Sarbaz River Basin of Sistan and Baluchestan Province
Hydrological models are simplified representation of the real basin system, which helps to assess basin function in response to different inputs and better understanding of hydrological processes. The HEC-HMS model is one of the most important hydrological models for Flood estimating volumes and discharge in watersheds. In this research, the HEC-HMS hydrologic model was used to simulate the ...متن کامل
The land use changes study and precipitation-runoff modelling using HEC-HMS, Case Study: Babolrood basin
Abstract Change in land use pattern influenced hydrological processes in basin and disrupt the normal balance of water flow. In the present research, hydrological parameters change of Babul Rod watershed basin has been that investigated concluded of land use changes in 1988 and 2009. To determine land use changes of Babul Rod watershed basin we has recruited TM satellite images 1988(1367) year ...متن کامل
The last two decades have seen increasing applications of digital terrain modeling in hydrological, geomorphological, pedagogical, and biological research, aided by rapid advancement of geographic information system (GIS). Hydrologic models are sensitive to change in the input values to the model, so the change of pixel size input data affects the output values of the model and produces differe...متن کامل
Flood is one of the natural hazards that its frequent occurrence has increased in the recent years and the damages of it, had affected apart of country in every year. Prioritization of sub basins has an important effect in watershed management. The purpose of prioritization of sub basins is offer a pattern for control and decrease flood hazards and evaluating the role of each sub basin in peak ...متن کامل