Effect of land use and vegetation on erosion forms and sediment production (Case Study: Watershed Vers Qazvin province)

Subject Areas : Geopolitic

Mehrdad Esfandiari ¹ , Abolfazl Moeini ² , Rahele Moqadasi ³

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Received: 2015-10-13 Accepted : 2015-10-13 Published : 2014-07-23

Keywords: land use, Geographic Information System , Erosion forms, MPSIAC models,

Abstract :

In recent years, the interaction of land use change with soil erosion has become a major environmental concern and has a dramatic impact on soil erosion and sediment yield. In this research the impact of land use and vegetation on erosion forms and sediment production of the basin vers in Qazvin province was investigated using MPSIAC erosion model by Geographical Information System (GIS). The different forms of erosion (Surface, Rill, gully, bank, Stream) can be seen as moderate to severe in vers watershed. Amount of sediment for the whole of watershed was 7.1 ton per hectare per year and the amount erosion was 7.04 tons per hectare per year. Dryland farming with 2.14 (metric tons per hectare per year) has the greatest impact on erosion and sediment yield. In pasture (type 3) and dry farming have very high sediment yield and indicated the improper use of land. Sediment produced on pasture (Type 1) Less than a garden land use that reflects the positive impact of proper pasture vegetation in reducing the amount of erosion and deposition.