Multiple-criteria determination and preventive measures of river ecological water level in the Northern Jiangsu plain
•In this manuscript, the corresponding environmental water level threshold will be determined by the subsection design method. The comprehensive calculation, the relevant methods, and measures for targeted management and control of the river's environmental water level (flow) will be analyzed t...
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Published in | Watershed ecology and the environment Vol. 5; pp. 64 - 72 |
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Main Authors | , , , , , , |
Format | Journal Article |
Language | English |
Published |
Elsevier B.V
2023
KeAi Communications Co., Ltd |
Subjects | |
Online Access | Get full text |
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Summary: | •In this manuscript, the corresponding environmental water level threshold will be determined by the subsection design method. The comprehensive calculation, the relevant methods, and measures for targeted management and control of the river's environmental water level (flow) will be analyzed to provide technical and reference support to further enhance the environmental flow assurance of rivers and lakes in the study area.•According to the river's current environment and the actual circumstances surrounding its operation and administration, the upper, middle, and lower reaches make up the three sections of the Zong-Liutang River in the Plain of Northern Jiangsu. Furthermore, the ecological water level governing factor for each reach was analyzed and studied.•The threshold of the middle reach was thoroughly analyzed by using the determination method with multi-criteria. Taking into account the hydrological and hydrodynamic characteristics, observed hydrological data conditions of rivers, and the actual operation rules of rivers and water projects regulations in the Northern Jiangsu plain.•Through comparing and contrasting actual operation and management plans, the target values of the ecological water level for the river's upper, middle, and lower reaches were obtained, respectively. Based on the river's ecological water level's control value, which was found through a thorough analysis, and the river's real operation and management conditions, specific measures to protect the river's ecological water level were suggested.
It is vital to employ efficient methods to calculate and determine the threshold of river ecological flow. These methods help to get the river ecological status control countermeasures in the plain river networks and construct a flawless long-term mechanism of ecological flow control (water level). According to the river's current environment and the actual circumstances surrounding its operation and administration, the upper, middle, and lower reaches make up the three sections of the Zong-Liutang River in the Plain of Northern Jiangsu. Furthermore, the ecological water level governing factor for each reach was analyzed and studied. The ecological water level threshold in the upper and lower reaches of the Zong-Liutang River adopted the specified values of Jiangsu Provincial Department of water resources. The threshold of the middle reach was thoroughly analyzed by using the determination method with multi-criteria, which consisted of the hydrological and hydraulic methods (including yearly minimum water level with a 90% assured rate method; wetted perimeter method; minimum monthly average water level method), aquatic living conditions method, and river landscape entertainment factor method. Taking into account the hydrological and hydrodynamic characteristics, observed hydrological data conditions of rivers, and the actual operation rules of rivers and water projects regulations in the Northern Jiangsu plain. Through comparing and contrasting actual operation and management plans, the target values of the ecological water level for the river's upper, middle, and lower reaches were 17.4 m, 8.96 m, and 7.5 m, respectively. Based on the river's ecological water level's control value, which was found through a thorough analysis, and the river's real operation and management conditions, specific measures to protect the river's ecological water level were suggested. These included developing a perfect and workable ecological flow control method, speeding up the development of an ecological water level goal assurance early warning system, and an ecological flow and inlet system. |
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ISSN: | 2589-4714 2589-4714 |
DOI: | 10.1016/j.wsee.2023.01.001 |