Journal of Range and Watershed Managment

Effects of land use changes on flood characteristics using HEC-HMS model (Case study: Taleghan watershed)

Document Type : Research Paper

Authors

Samaneh Razavizadeh 1
Ali Salajegheh 2
Shahram Khalighi Sigaroudi 3
Mohammad Jafari 4

1 Ph.D student, Faculty of Natural Resources, University of Sari, Iran

2 Associate Professor, Faculty of Natural Resources, University of Tehran, Iran

3 Assisstant Professor, Faculty of Natural Resources, University of Tehran, Iran

4 Professor, Faculty of Natural Resources, University of Tehran Iran

https://doi.org/10.22059/jrwm.2013.36514
Abstract
Land use change is one of the main factors in the process of changing the regime of flood in watersheds. Taleghan watershed has been subjected to many land use changes over years, which probably effects on flood characteristics of Taleghan River. In present study the effects of land use change on some parameters including peak flow, volume and flood base time, in part of Taleghan basin, was investigated by using Geographical Information System (GIS) and HEC-HMS model. Land use maps of 1987 and 2002 were prepared and integrated with soil hydrological groups and pasture conditions maps in GIS with the aim of providing of CN map. Then by using curve number and SCS unit hydrograph in sub basins and also Muskingum routing method,  HEC-HMS model was calibrated and validated, for 10 incident rainfall - runoff views. Results of the simulation showed that due to the changes in land use (the reduction in the level of agricultural lands and increases in pasture areas), peak flow and flood volume in 2002 than in 1987 showed the average reduction of 46% and 34%, respectively. The evaluation of base time of flood showed no change in the parameter in flood hydrograph at the study period. On the whole the results showed that the trend of land use changes have the positive effect on reducing flood productions in study area.

Keywords

Flood
HEC-HMS model
land use changes
Taleghan watershed
Journal of Range and Watershed Managment
Volume 66, Issue 3 - Serial Number 3
Autumn 2013
Pages 373-386

  • Receive Date 01 November 2010
  • Revise Date 02 March 2014
  • Accept Date 16 May 2011
  • Publish Date 23 October 2013

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