Modelled tests on a key dam show that, under nappe flow over three different slopes on a stepped overflow structure, unit energy in the flow cross section before the hydraulic jump increases with increasing slope, and ~H_~dam/~y_c similarly increases.

The paper approaches control area indexes of a single key dam, construction sequence of key dams, configuration of key dams and medium and small-sized dams and handling principles of common issues in old dam rebuilding and strengthening for different erosion intensity regions.

Practice proved that the channel project and the dam system in small watershed with key dams and warping dams in the Loess Plateau played important roles in sediment retention and farmland-making, flood control,use of water resources, irrigation, fishery, drinking water supply and improving traffic condition.

Numerical Calculation and Analyse on Flow Characteristics Around Fish-bone Type Dividing Dike;

The dam of Tapangou Reservoir is a dry-laid masonry dam with grouted stone gravity wall,its strength and stability do not satisfy the standard request and should be enhanced through consolidation grouting and curtain grouting.

Geological and geochemical features of the Ganheba gold deposit, Lueyang, South Qinling;

Capacity of a backbone wireless mesh network using directional antennas;

On the Training of the Swimming Backbone in the Army;