Volume 17, Issue 66 (winter 2014)
jwss 2014, 17(66): 159-171 |
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Hashemi S A A. Effect of Rock Check Dams on Flood Reducing in Arid and Semi Arid Regions (Case Study: Darjazin Watershed in Semnan Province). jwss 2014; 17 (66) :159-171
URL: http://jstnar.iut.ac.ir/article-1-2255-en.html
URL: http://jstnar.iut.ac.ir/article-1-2255-en.html
, hashemiaa12@gmail.com
Abstract: (11652 Views)
Check dams are considered as main measures for flood and sediment control in watersheds, and their uses have been rapidly increased from 1990 onward in Iran. This research is done in Darjazin watershed in north of semnan city. The check dams have been constructed from 15 years ago in two sub basins of the watershed for flood control in Mahdishar. More than 650 check dams were evaluated for effects on flood. The collected data in the field was fed to ArcGIS software. The effects of these structures on flood reduction were evaluated by HEC-GeoHMS extension and HEC-HMS model. Because of homogeneity of watershed management projects in the basin due to building more check-dams in different watercourses, any flood discharge is related to check dams. Evaluating the effects of check dams on flood by t-test showed significant differences between flood discharge before and after construction of check dams at 5 percent level. So, check dams have been able to reduce flood discharge by 16.7 percent on average.
Type of Study: Research |
Subject:
Ggeneral
Received: 2012/08/9 | Accepted: 2013/02/20 | Published: 2014/02/10
Received: 2012/08/9 | Accepted: 2013/02/20 | Published: 2014/02/10
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