At the present stage, soil and water conservation engineering measures and biological measures in loess plateau region have been investigated, however, the study and investigation of soil and water conservation tillage measures is relatively less.

Affecting mechanism of soil and water conservation measures controlling nonpoint source pollution;

Analysis on the benefits of water and sediment interception under the conditions of different soil and water conservation measures in Qingjian River Basin;

Assessment model for soil and water conservation measures impact on runoff and sediment and its application;

To research the reasons why the existed measures of soil and water conservation bring the different benefit of soil and water conservation which are existing in the same valley and at the same time.

On the basis of investigating current situation of mining area, characteristic, trend foundation of soil erosion, we have analyzed the security validity of the existing water and soil conservation measures, and proposed concrete projects and relevant suggestions supplementin.

The investigation on land use and water and soil conservation measures by remote sensing is a subproject supported by the project "Investigation on water and soil conservation by remote sensing in the drainage basin of the Yellow River, Inner Mogonlia".

The hydrological effects of water and soil conservation measures were studied with parallel comparative analysis method.