MOISTURE DISTRIBUTION AND MOVEMENT IN SANDY LANDS OF CHINA
Feng Qi; Cheng Guo-dong (Lanzhou Institute of Glaciology and Geocryology, Academia Sinica, Lanzhou 730000)
Based on the assemblage characteristics of bioclimatic zone, aridity, mean moisture content of sandy land, precipitation, etc, five zone, i. e., desert, smidesert, steppe, subhumid and humid zone were divided for sandy lands and deserts of China. The moisture movement, stable moisture contents and available moisture storages in each zone are summed up and analysed. The main factors affecting moisture dynamical variations of sandy lands are discussed. The concrete measures for afforestation and selection of tree species in different sandy zones are put forward. Finally, the development and agricultural production directions, economic benefit of irrigation agriculture, and future development tendeney of different sandy lands are discussed.