| Water quantity-quality combined evaluation method for rivers＇ water requirements of the instream environment in dualistic water cycle： A case study of Liaohe River Basin |
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| 作者姓名： | WANG Xiqin ZHANG Yuan LIU Changming |
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| 作者单位： | [1]School of Natural Resources and Environment, Renmin University of China, Beijing 100872, China [2]River and Coastal Environmental Research Center, Chinese Research Academy of Environmental Sciences Beijing 100012, China [3]Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China [4]Key Laboratory for Water and Sediment Sciences of the Ministry of Education, Beijing Normal University Beijing 100875, China |
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| 基金项目： | Major consultation programs of Chinese Academy of Engineering; Key Scientific and Technological Programs of the Ministry of Education, No. 105042; ＂973＂ Project, No.G 1999043601 |
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| 摘 要： | In this article the meaning of the quantity and quality of environmental flows of river in dualistic water cycle is discussed, and compared with the meaning of unitary water cycle. Based on the analysis of the relationship between environmental flows of river requirements, the efficiency of water resource usage, the consumption coefficient, and the concentration of waste water elimination, the water quantity and water quality calculation method of the environmental flows of river requirements in dualistic water cycle is developed, and the criteria for environmental flows of river requirements are established, and therefore the water quantity-quality combined evaluation of natural river flows requirements are realized Taking the Liaohe River as a model, the environmental flows of river requirements for Xiliao River, Dongliao River, mainstream Liaohe River, Huntai River and northeast rivers along the coasts of the Yellow and Bohai seas in unitary water cycle are calculated, each taking up 39.3%, 63.0%, 43.9%, 43.3% and 43.5% of runoff respectively. Evaluated according to Tennant recommended flow, the results show that： except Xiliao River is ＂median＂, the rest are all upon ＂good＂, the Dongliao River is even ＂very good＂. The corresponding results in dualistic water cycle are that, the proportion of natural flows for each river is 57.5%, 74.1%, 60.8%, 60.3% and 60.4%; while the combined evaluation results show that： considering ＂quantity＂, except Xiliao River, the rest rivers can all achieve the ＂quantity＂ criteria of the en- vironmental flows of river requirements, but if considering the aspect of ＂quality＂, only Dongliao River can reach the ＂quality＂ standard. By water quantity-quality combined evaluation method, only Dongliao River can achieve the criteria. So the water quality is the main factor that determines whether the environmental flows can meet the river ecosystem demands.
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| 关 键 词： | 辽河盆地 河水 水质 水循环 |
| 收稿时间： | 2/6/2007 12:00:00 AM |
| 修稿时间： | 2007-02-062007-03-18 |
Water quantity-quality combined evaluation method for rivers’ water requirements of the instream environment in dualistic water cycle |
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| WANG Xiqin ZHANG Yuan LIU Changming.Water quantity-quality combined evaluation method for rivers’ water requirements of the instream environment in dualistic water cycle[J].Journal of Geographical Sciences,2007,17(3):304-316. |
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| Authors: | Wang Xiqin Zhang Yuan Liu Changming |
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| Institution: | (1) School of Natural Resources and Environment, Renmin University of China, Beijing, 100872, China;(2) River and Coastal Environmental Research Center, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China;(3) Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing, 100101, China;(4) Key Laboratory for Water and Sediment Sciences of the Ministry of Education, Beijing Normal University, Beijing, 100875, China |
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| Abstract: | In this article the meaning of the quantity and quality of environmental flows of river in dualistic water cycle is discussed,
and compared with the meaning of unitary water cycle. Based on the analysis of the relationship between environmental flows
of river requirements, the efficiency of water resource usage, the consumption coefficient, and the concentration of waste
water elimination, the water quantity and water quality calculation method of the environmental flows of river requirements
in dualistic water cycle is developed, and the criteria for environmental flows of river requirements are established, and
therefore the water quantity-quality combined evaluation of natural river flows requirements are realized. Taking the Liaohe
River as a model, the environmental flows of river requirements for Xiliao River, Dongliao River, mainstream Liaohe River,
Huntai River and northeast rivers along the coasts of the Yellow and Bohai seas in unitary water cycle are calculated, each
taking up 39.3%, 63.0%, 43.9%, 43.3% and 43.5% of runoff respectively. Evaluated according to Tennant recommended flow, the
results show that: except Xiliao River is “median”, the rest are all upon “good”, the Dongliao River is even “very good”.
The corresponding results in dualistic water cycle are that, the proportion of natural flows for each river is 57.5%, 74.1%,
60.8%, 60.3% and 60.4%; while the combined evaluation results show that: considering “quantity”, except Xiliao River, the
rest rivers can all achieve the “quantity” criteria of the environmental flows of river requirements, but if considering the
aspect of “quality”, only Dongliao River can reach the “quality” standard. By water quantity-quality combined evaluation method,
only Dongliao River can achieve the criteria. So the water quality is the main factor that determines whether the environmental
flows can meet the river ecosystem demands.
Foundation: Major consultation programs of Chinese Academy of Engineering; Key Scientific and Technological Programs of the Ministry
of Education, No.105042; “973” Project, No.G1999043601
Author: Wang Xiqin (1965–), specialized in water resource management, environmental water requirement. |
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| Keywords: | dualistic water cycle rivers environmental flows of river requirements water quantity water quality evaluation Liaohe River |
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