,DeNitrification-DeCompositon),was adopted in the study to quantify SOC storage and dynamics in croplands of the Upperstream Watershed of Miyun Reservoir in North China.

Miyun reservoir is the most important drinking water source of Beijing city,while the landscape pattern in the upper basin of Miyun reservoir and its variation may has direct influence on the water quantity and quality of this reservoir.

Soil erosion in Miyun reservoir watershed and control countermeasures;

Studies on sustainable development and discussion on its countermeasures in Miyun Reservoir Watershed;

According to the eco economic theory, 53 specific indexes suitable for classification of eco economic systems of the Miyun reservoir watershed in Beijing were selected.

Taking Miyun Reservoir as the research object,5 sensitive indices for eco-environment were selected based on the information of eco-environmental investment and previous studies,such as ecological service value,geology disaster,vegetation-cover index,slope,land-use types.

A Floristic study on the seed plants from Yunlong reservoir area in Yunnan;