Study and Comparision of Pedological and Morphoclimatical Charastristics of Gullies

Soil is one of the most important of natural resources in each country. But soil erosion is threat for human health and welfare which causes inside and outside regional probelems. Gully erosion is one of the erosion advanced and severe type which causes topsoil loss. Therefore، the aim of present study were morphoclimatical and pedological comparison of gullys formed in the two watersheds of Zohreh and Maroon which are located in sensitive Gachsaran and Mishan formations to erosion. This study was done by field operations such as; mapping، marking and sampling of gullys soil at different distance of headcat. Data was analyzed by EXCEL software. The resoults shows that variations of EC، ESP and SAR are more in Gachsaran formation with respect to Dehdasht climate. This difference were caused by the different amount of salt in soil. Therfore، soil erosion in Gachsaran is more than Dehdasht. So that general profile form of gullies in Dehdasht region were linear and palmate forms while in Gachsaran region (Deg-seliman and Drila) are usually unlinear and palmate forms. Headcat profile of gachsaran and Dehdasht regions were were caves and plantcover respectively. The result of soil stability pieces shows that; upper soil horizon of two regions were in class VII (sewelling) and lower soil horizon were in class I (complete despersion).