Abstract

In aria and semi-aria in spite of low annual precipitation short time storms is one of the climatic characteristics which cause the flood damages. Floods not only erode the soil and carries the fertile soil into the dam's reservoir but also damages infrastructures, such as roods, Villages and cities. On the other hand, the role of watershed management practices in order to reduction soil erosion and ran off, soil moisture conservation, sediment yield control and water supply are important, so it should be evaluation the effectiveness of such practices. Watersheds are viewed the main sources of generation water and energy (hydroelectric), and various agricultural and domestic products. They should be operated, such as any resembled system, with a comprehensive and coordinated planning and management. They are identified as the only way to meet problems such as flood, erosion, sediment, decrease in underground water sources, jungles (forest) and pastures destruction and decrease in dry farmlands return. The study area is Anbaran watershed in Ardebil province that instruction in order to control flood and soil conservation in this work the effectiveness of management mechanical and biological practices on the sediment yield evaluated and compared after and before construction of soil conservation practices by MPSIAC.

Keywords: watershed, watershed management practices, sediment, erosion, evaluation