Pedosphere 16(1): 33--42, 2006
ISSN 1002-0160/CN 32-1315/P
©2006 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Determination of a reasonable percentage for ecological water-use in the Haihe River Basin, China |
XIA Jun1,2 , FENG Hua-Li3, ZHAN Che-Sheng1 and NIU Cun-Wen2 |
1 Key Laboratory of Water Cycle & Related Land Surface Processes, Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Science, Beijing 100101 (China). E-mail: xiaj@igsnrr.ac.cn;
2 State Key Laboratory of Water Resources & Hydropower Engineering Sciences, Wuhan University, Wuhan 430072 (China);
3 Nanjing Hydraulic Research Institute, Nanjing 210029 (China) |
| ABSTRACT |
| An investigation was conducted to study problems of determining a reasonable percentage for ecological water-use in the Haihe River Basin of China. Three key aspects for the ecological water requirement (EWR) were analyzed, involving i) the EWR for river system, ii) the EWR for wetlands and lakes, and iii) the EWR for discharge into the sea to maintain the estuary ecological balance of the Haihe River. The Montana method and related water level-flow relationships, and the statistic approach based on hydrological records were applied to estimate different components of EWR. The results showed that the total ecological water demand in the region was about 3.47-14.56 billion m3. Considering flow regime change and uncertainty, the ecological water demand could be estimated by the hydrological frequency approach. Preliminary analysis showed that for different annual runoff under the frequencies of 20%, 50%, 75% and 95%, the ecological water demand approached 12%-50%, 18%-74%, 24%-103%, 35%-148% and 16%-66%, respectively. By further analysis to balance ecological water-use and socioeconomic water-use, the rational percentage of ecological water-use was estimated as 35%-74%, that provides useful information to judge whether the allocation of water resources is reasonable, and was proved to be satisfactory by comparing with the practical condition. |
| Key Words: ecological water requirement, ecological water-use, Haihe River Basin |
| Citation: Xia, J., Feng, H. L., Zhan, C. S. and Niu, C. W. 2006. Determination of a reasonable percentage for ecological water-use in the Haihe River Basin, China. Pedosphere. 16(1): 33-42. |
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