Trend and causation analysis of runoff variation in the upper reach of Chaobaihe River Basin in northern China during 1961-2005;

Impacts of soil and water conservation measures on annual runoff in the upper Chaohe River Basin in northern China based on hydrological analysis method;

Water Quality Assessment In Chaobai River By Fuzzy Synthetic Evaluation Method;

Chaobai river is one of the most important wetlands in Beijing.

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.

The relationship between population pressure growth and environmental change in recent 600 years in the upper reaches of the Fenhe River;