Gao Qianzhao

Sustainable Development and Management of Water Resources in the Hei River Basin of North-west China

The quantitative and qualitative evaluation of water, land and biotic resources in the inland river basins is important in the arid zone. Analysis of the exploitation potential of water resources and the environmental changes through water development can help people in the sustainable development and management of water resources within the basin. Water resources development has affected the scale of oasis establishment in the middle reaches and the existence of lower-reach oases in the Hei River basin. Exploitation and utilization of water resources at the present stage should bring about a harmonic relation between economic development and the ecological environment in the whole basin. The whole area should be considered as an entirety to adopt feasible engineering and administrative measures such as strengthening the protection of water resources in upper streams, macro-control of water consumption and implementing water-saving measures in middle and lower reaches, quantitatively managing and allotting water resources in accordance with regional conditions and adherence to comprehensive rehabilitation. Thus, economic, environmental and social benefits of water resources can be enhanced.

Development strategies of water and land resources in the hexi region, China

Hexi region is located in the northwest arid zone in China, being both the base of industry and agriculture, and the prop of developing northwestern China on a large scale in the next century. On the basis of the study on exploitation and utilization process of water and land resources in past 40 years, and present productivity, this paper approaches the utilization trend and development potential of water and land resources; analyses the characteristics, problems and directions of resource utilization in the future; and proposes the countermeasures of rational development of water and land resources.

Preliminary study on flash floods in Tarim River basin

Flash floods are the important events of the hydrological regime of rivers in arid areas. In the Tarim River, northwestern China, flash floods are being monitored. The observed data and investigation demonstrate the difference in time, place, frequency and intensity of their occurrences. In this paper two main flash floods are put forward, they are rainstorm flash flood (RFF) and glacier lake outburst flood (GLOF). Two cases of flash flood in the two tributaries of the Tarim River presented in this paper. It analyses and compares the causes and the development of the two kinds of flash floods. Through further discussion about influence of flash floods on the main channel of the Tarim River, conclusion can be drawn that the greatest flood in record of the main channel come from the GLOF of the upper reaches of the Kunmalik River, especially augmented by great ablation flood. Finally the advantages and disadvantages from flash floods to the environment of the catchment are demonstrated in the paper.