Determining the sensitivity to erosion (Medan watershed)
Subject Areas :Ghorban Vahhabzadeh 1 , پیام Ebrahimi 2
1 - استادیار دانشگاه علوم کشاورزی و منابع طبیعی ساری
2 - کارشناس ارشد دانشگاه کشاورزی و علوم طبیعی ساری
Keywords: MPSIAC, Hunt Bowen, BLM, FARGAS, Feiznia table, Medan watershed,
Abstract :
The uses of the sediment and erosion models are the most suitable methods to estimate the soil loss rate ina watershed. In this research 4 method of Fargas, BLM, MPSIAC, Feiznia tables and Hunt Boweninfiltrations method were used to calculate the soil loss rate in different work units of Alamoot Medanwatershed in Qhazvin province. The areas which were effective in soil loss were determined with thesemethods and then results were compared to each other. Results showed that the models Fargas, MPSIACand BLM with grades of 40.75, 50.81 and 43.73 have close mean to each other and mean erodibility.Feiznia table evaluated the region more erodible and infiltration was determined slowly by Hunt Bowen.Moreover, based on the hydrological response the sub watershed 4 with an area of 2292.308 hectare and 1with an area of 1389.06 hectare had most effects when flood happened. For operational programs tocontrol erosion and sediment production in region it is recommended that in first priority must be subwatershed 4 and 1. If the purpose is runoff penetration and preventing flood sub watershed 4 with an areaof 2734.827 hectare and 1 with an area of 1544.648 hectare and 2 with an area of 680.386 must berespectively first priority