by determining relative importance and contributions of erosion types to sediment yield, erosion susceptible areas in a watershed will be identified, and sediment control and soil conservation projects can be focused on that areas. because of many problems associated with traditional procedures for identifying sediment sources, fingerprinting techniques, based on physical, chemical and organic ...

there are various methods and models for land evaluation. these methods are classified according to the number of used resources. the best resources capabilities or potentials and land use can be found by analyzing one of the main resources, in the lands close relations to ecologic resources exist. soil has a great potential for introducing the studied region specifications. hence, it challenge...

1. introduction world bank, in a report on our country, has named the following factors as the water challenges facing the country: decrease in per capita recoverable water, loss of water quality, inefficient use of effective consumption monitoring in industry and agriculture, soil salinity, the poor quality of maintenance and preservation of reservoirs, restrictions on the recoverable cost and...