Mo polymetallic anomalies characteristics of upriver Duobuku er river in Daxing anling with its prospecting perspective discussion;

This paper,based on a case study of the upstream of Fenhe Reservoir in Yellow River,applies the Remote Sensing data of Landsat MSS(1976),TM(1990) and ETM+(2002) to dynamically monitor the land erosion with the results indicating that the soil has been eroded extensively during 1976 to 1990,and turned to a good condition in general during 1990 to 2002,but still worsening lo.

Analysis on the sand production in the upstream basin of Fenhe reservoir;

Effects of Upper Yellow River Pollution on Antioxidant Enzymes Activities and Malondialdehyde Content of Bufo raddei;

Reconstruction of recent 522-year runoff series on Upper Yellow River and analysis on its variation trend;

Climate variation in upper Yellow River in 1990s and its influences on inflow of Longyangxia Reservoir;

For the severe situation of eco-unbalance in the upper reaches of the Yellow River, the study of function for soil and water conservation in rehabilitated lands not only has the theoretical values, but has the urgent need for practice.

Based on field geological investigations of avalanches,landslides and mudflows in the upper reaches of the Yellow River,the authors determined the main influence factors and index system of the hazard risk evaluation and made risk evaluation with the county(city or qi)as a unit.

They are located among high mountains and gorges in upper reaches of the Yellow River.