Formation and Sustainable Utilization of Water Resources in the Hexi Area of China 

作成者 Ersi, Kang
日本十進分類法 (NDC) 452.9, 450.922
内容 研究概要:In the Hexi area of northwest China, along with the increase of altitude, precipitation increases, air temperature and evaporation decrease. The mountainous watersheds receive much more precipitation, and possess lower temperature and lower evaporation rate as compared with the low land area, and therefore are the runoff generation area. The runoff is consumed and scattering at the low land area. In the mountainous watersheds, both the high mountain zone and the mountain vegetation zone are important to contribute the runoff generation. From east to west of the area, the runoff depth decreases and the contribution of glacier melt water to runoff increases. Both the mountainous watersheds and the low land area in front of the mountains show an increase of air temperature and precipitation. The runoff reduction in the low land area can be attributed mostly to the human activities. The yearly runoff and runoff in the summer months from the mountainous watersheds are well coorelated to the mountain precipitation. The monthly runoff of April, May, September and October is well possitively correlated to air temperature, but sometimes negatively correlated to precipitation. Therefore, during those months of spring and autumn, snow melt runoff contribute most of the river runoff. In the exploitation and utilization of water resources, in addition to the further construction of the water conservancy facilities and carrying out the water transferring engineering over the drainage basins, the emphasis shoule be put on how to manage and efficiently use the limited water resources, to make the most of the social, economical and ecological benefit of water resources.
コンテンツの種類 研究報告書 Research Paper
掲載誌情報 Proceedings of the international symposium on hydro-environment in Asia page.155-165 (1997)
言語 英語

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