关键词: 黑河中游, 水资源开发利用, 水资源安全

Abstract: After analyzing the hydrological data for 58 years in Heihe river basin it was found that the regional water resources was relatively stable due to the replenishment of glacial melt-water. The ratio of the biggest annual runoff to the smallest one was 2:1, and the average water resources was 32.31×10⁸ m³·a^-1. The average per capita water reached (1 689) m³·a^-1, which was within the world-accepted safety range of 1 000~1 700 m³·a^-1. But among the water resources there are 7.5×10⁸ m³·a^-1 should be used for ecological consumption. With consideration to the characteristics of water resources being retransformed and reused for many times, and the water-saving measures being adopted in the whole river basin, the water resources was still within safety range. According to water resource status, land developmental scale and the eco-environmental situation, the threshold safety line of natural runoff resources in the study river basin is defined as 32.31×10⁸ m³·a^-1; and the safety cordon is 28×10⁸ m³·a^-1.

Key words: middle Heihe river basin, water resource development and utilization, resource safety