Answering the call from Mao Zedong that "We must bring the Haihe River under permanent control," Hebei Province launched in 1965 the large-sc.

Through introducing the experiment of surveying Yellow River base rock by 5 pole vertical axis depth sounding method,this paper proves the 5 vertical axis depth sounding method is more effective and then in theory it analyzes the reason why surveying base rock by using 5 vertical axis depth sounding method is more effective than by 4 Symmetrical depth sounding and why its resolution is higher.

Impact of elevations and slopes on the status quo of soil and water loss in the tiny watershed of Genxi River;

Potentiality Evaluation of Ecological Remediation in the Small Watershed of Genxi River;

Characteristics of Early Cretaceous volcanic complexes in the Genhe area in the northern segment of the Da Hinggan Mountains:with a discussion of their genesis;