Analysis of Gully Morphometery in Relation with Physical and Chemical Characteristics of Soil in Kojur, Noushar, Mazandaran Provinc

Gully erosion is one of the most destructive types of hydraulic erosion and an important process in soil destruction that in some cases creates long, vast, deep canals. Study area was located in the northeastern Alborz, Mazandaran province and Nowshar County (Firozkola subbasin a portion of Kojur watershed). This paper examines gully morphometery in relation with physical and chemical characteristics of soil. The morphometery of gullies such as width, depth and slope were determined in field. Physical and chemical properties of soil such as exchange cation (EC), organic and inorganic carbon, soil acidity and soil texture were determined in the laboratory. Data analyses were performed by Detrended correspondence analysis (DCA). The DCA analysisindicated that the width and slope are correlated with OC and clay negatively but they have positive correlation with pH.Hence, it's expected that following reduction of OC and clay and an increase in PH, gully width boosts. Besides, if EC increases and CaCO3 decreases, depth and w/d ratio of gully will increase.