Sediment and erosion studies using experimental models and compare them using statistical methods in Kan and Darakeh subbasins

Subject Areas :

Nastaran Keyhani ¹ , Khalil Rezaei ² , Seyed Hamid Vaziri ³ , Ali Naeimi Nezam Abad ⁴

1 - کارشناس ارشد دانشگاه آزاد اسلامی واحد تهران شمال
2 - استادیار دانشگاه خوارزمی تهران
3 - استاد دانشگاه آزاد اسلامی واحد تهران شمال
4 - استادیار دانشگاه آزاد اسلامی واحد ساوه

Received: 2016-09-05 Accepted : 2016-09-05 Published : 2013-06-22

Keywords: Erosion, Sediment, EPM, MPSIAC, Geostatic, Kan, Darakeh,

Abstract :

One of the major problems in the integrated management of watersheds is soil erosion and Sediment. The controlof this problem requires precise studies; quantitative data to determine critical and prone to erosion areas. Thus,an analysis of rate of erosion and sediment production using GIS techniques and experimental methods, such asEPM and MPSIAC seems necessary. In this study, we tried to use these two models to determine the amount ofsediment and erosion-prone areas in the two sub watersheds overlooking the city of Tehran; Kan and Darakeh torecognize where necessary for conservation operations. Finally with use geostatics operations, two models werecompared. The results show the most values of erosion are in Tuffy, Shaly Parts of sub watersheds correlatedwith sensitive formation such as Karaj. Based on map of MPSIAC model more than 50% of the total subwatersheds area was classified at class high of erosion category with 373.78 m3∕km2 per year for Kan and 483m3∕km2 per year for Darakeh sedimentation. Sub-basins’ erosion were calculated as 683.2 m3∕km2 per year forKan and 792.5 m3∕km2 per year for Darakeh by EPM models. The results of statistical compare of erosion ofMPSIAC and EPM models show that, there is no significant different between erosion estimate by MPSIACmodel and real erosion measure, but the erosion estimate by EPM model have a significant different. SomMPSIAC model may have better performance.