Ecological Water Demand Calculation with the Consideration of the Health of Fish Spawning Ground——A Case Study of Dongta Spawning Ground in Xijiang River
The spawning ground is a sensitive place in the fish habitat. It has specialhydrological and hydrodynamic characteristics and has important ecological significance for thenatural reproduction of fish. Calculation of ecological water demand for the natural reproductionof four major Chinese carps and...
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Editorial Office of Pearl River
2020-01-01
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| Series: | Renmin Zhujiang |
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| Online Access: | http://www.renminzhujiang.cn/thesisDetails#10.3969/j.issn.1001-9235.2020.05.010 |
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| author | ZHOU Huabin YU Chunxue SU Meirong |
| author_facet | ZHOU Huabin YU Chunxue SU Meirong |
| author_sort | ZHOU Huabin |
| collection | DOAJ |
| description | The spawning ground is a sensitive place in the fish habitat. It has specialhydrological and hydrodynamic characteristics and has important ecological significance for thenatural reproduction of fish. Calculation of ecological water demand for the natural reproductionof four major Chinese carps and ensuring of the water demand for domestic fish reproduction areeffective method to effectively alleviate the decline trend of domestic fish resources. Taking theDongta spawning ground in the Xijiang River Basin as the study area and four major Chinese carpsas the target species for the first time, this paper constructs the related suitability curve forthe hydrodynamic characteristic index, simulates the effects of factors such as flow velocity andwater depth on fish spawning grounds at different flow conditions by a two-dimensional riverhydrodynamic model, River2D, establishes the relationship between the flow conditions and weightedusable area (WUA) of four major Chinese carps habitats to determine the ecological water demand inthe study area. The results show that based on the simulation results of twenty flow conditions (1000~20 000 m<sup>3</sup>/s), the maximum WUA of the Dongta spawning ground is 101 935.48 m<sup>2</sup>, and theecological water demand corresponding to the WUA is 10 277.54~12 546.61 m<sup>3</sup>/s, which can be used asthe peak ecological water demand during the spawning period of the four major Chinese carps. Basedon the simulation results of historical monthly average flow conditions, the corresponding flowsof the minimum WUA in the Dongta spawning ground from January to December are 1 339.67, 1 256.53,1 361.93, 2 126.09, 4 057.10, 6 202.66, 6 734.19,5 316.12, 3 092.66, 1 680.32, 1 234.40, 1 168.32m<sup>3</sup>/s, which are the minimum ecological water demand to maintain the function of Dongta spawningground. Determining the ecological water demand of the river based on the health of the spawninggrounds of the four major Chinese carps is conducive to the improvement of fish resources, and isof important ecological significance in maintaining biodiversity and even the entire ecosystem. |
| format | Article |
| id | doaj-art-31f144583ab04eb6b91160a661b265fe |
| institution | Kabale University |
| issn | 1001-9235 |
| language | zho |
| publishDate | 2020-01-01 |
| publisher | Editorial Office of Pearl River |
| record_format | Article |
| series | Renmin Zhujiang |
| spelling | doaj-art-31f144583ab04eb6b91160a661b265fe2025-01-15T02:32:07ZzhoEditorial Office of Pearl RiverRenmin Zhujiang1001-92352020-01-014147652887Ecological Water Demand Calculation with the Consideration of the Health of Fish Spawning Ground——A Case Study of Dongta Spawning Ground in Xijiang RiverZHOU HuabinYU ChunxueSU MeirongThe spawning ground is a sensitive place in the fish habitat. It has specialhydrological and hydrodynamic characteristics and has important ecological significance for thenatural reproduction of fish. Calculation of ecological water demand for the natural reproductionof four major Chinese carps and ensuring of the water demand for domestic fish reproduction areeffective method to effectively alleviate the decline trend of domestic fish resources. Taking theDongta spawning ground in the Xijiang River Basin as the study area and four major Chinese carpsas the target species for the first time, this paper constructs the related suitability curve forthe hydrodynamic characteristic index, simulates the effects of factors such as flow velocity andwater depth on fish spawning grounds at different flow conditions by a two-dimensional riverhydrodynamic model, River2D, establishes the relationship between the flow conditions and weightedusable area (WUA) of four major Chinese carps habitats to determine the ecological water demand inthe study area. The results show that based on the simulation results of twenty flow conditions (1000~20 000 m<sup>3</sup>/s), the maximum WUA of the Dongta spawning ground is 101 935.48 m<sup>2</sup>, and theecological water demand corresponding to the WUA is 10 277.54~12 546.61 m<sup>3</sup>/s, which can be used asthe peak ecological water demand during the spawning period of the four major Chinese carps. Basedon the simulation results of historical monthly average flow conditions, the corresponding flowsof the minimum WUA in the Dongta spawning ground from January to December are 1 339.67, 1 256.53,1 361.93, 2 126.09, 4 057.10, 6 202.66, 6 734.19,5 316.12, 3 092.66, 1 680.32, 1 234.40, 1 168.32m<sup>3</sup>/s, which are the minimum ecological water demand to maintain the function of Dongta spawningground. Determining the ecological water demand of the river based on the health of the spawninggrounds of the four major Chinese carps is conducive to the improvement of fish resources, and isof important ecological significance in maintaining biodiversity and even the entire ecosystem.http://www.renminzhujiang.cn/thesisDetails#10.3969/j.issn.1001-9235.2020.05.010fish spawning groundinstream flow incremental methodologysuitability curveRiver2D modelecological water demand |
| spellingShingle | ZHOU Huabin YU Chunxue SU Meirong Ecological Water Demand Calculation with the Consideration of the Health of Fish Spawning Ground——A Case Study of Dongta Spawning Ground in Xijiang River Renmin Zhujiang fish spawning ground instream flow incremental methodology suitability curve River2D model ecological water demand |
| title | Ecological Water Demand Calculation with the Consideration of the Health of Fish Spawning Ground——A Case Study of Dongta Spawning Ground in Xijiang River |
| title_full | Ecological Water Demand Calculation with the Consideration of the Health of Fish Spawning Ground——A Case Study of Dongta Spawning Ground in Xijiang River |
| title_fullStr | Ecological Water Demand Calculation with the Consideration of the Health of Fish Spawning Ground——A Case Study of Dongta Spawning Ground in Xijiang River |
| title_full_unstemmed | Ecological Water Demand Calculation with the Consideration of the Health of Fish Spawning Ground——A Case Study of Dongta Spawning Ground in Xijiang River |
| title_short | Ecological Water Demand Calculation with the Consideration of the Health of Fish Spawning Ground——A Case Study of Dongta Spawning Ground in Xijiang River |
| title_sort | ecological water demand calculation with the consideration of the health of fish spawning ground a case study of dongta spawning ground in xijiang river |
| topic | fish spawning ground instream flow incremental methodology suitability curve River2D model ecological water demand |
| url | http://www.renminzhujiang.cn/thesisDetails#10.3969/j.issn.1001-9235.2020.05.010 |
| work_keys_str_mv | AT zhouhuabin ecologicalwaterdemandcalculationwiththeconsiderationofthehealthoffishspawninggroundacasestudyofdongtaspawninggroundinxijiangriver AT yuchunxue ecologicalwaterdemandcalculationwiththeconsiderationofthehealthoffishspawninggroundacasestudyofdongtaspawninggroundinxijiangriver AT sumeirong ecologicalwaterdemandcalculationwiththeconsiderationofthehealthoffishspawninggroundacasestudyofdongtaspawninggroundinxijiangriver |