Impact of lake water level decline on river evolution in Ebinur Lake Basin (an ungauged terminal lake basin)
Most of the terminal lakes in inland basins, which account for half of the world's lake reserves, have been shrinking at an alarming rate in recent years. In a Terminal Lake Basin, changes in the water level of the lake can lead to variations in the local erosion base level. From the perspectiv...
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| Format: | Article |
| Language: | English |
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Elsevier
2021-12-01
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| Series: | International Journal of Applied Earth Observations and Geoinformation |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0303243421002531 |
| _version_ | 1811317586677202944 |
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| author | Juan Wang Shengtian Yang Hezhen Lou Huiping Liu Pengfei Wang Chaojun Li Fei Zhang |
| author_facet | Juan Wang Shengtian Yang Hezhen Lou Huiping Liu Pengfei Wang Chaojun Li Fei Zhang |
| author_sort | Juan Wang |
| collection | DOAJ |
| description | Most of the terminal lakes in inland basins, which account for half of the world's lake reserves, have been shrinking at an alarming rate in recent years. In a Terminal Lake Basin, changes in the water level of the lake can lead to variations in the local erosion base level. From the perspective of local erosion base level, we revealed the response of river evolution to change in the water level of lake in Ebinur Lake Basin for the past 5000 years. Our results verified the three geomorphic development stages of natural decline, balance maintenance, and imbalanced decline. In modern times, the decline in the number of rivers entering the lake due to human activities has made the water level of the lake drop 15–30 times that observed from 5 kaBP–0.1 kaBP. The results showed that the average undercut erosion rate of the river entering the lake tends to increase with a rapid decrease in the water level of the lake in the past 5000 years. The instantaneous undercutting rate of the Bortala river section in the basin was 1.6–4.2 times that observed from 5 kaBP–0.1 kaBP. This result showed that a rapid decline in the water level of the lake due to human activities will accelerate the erosion of rivers. Therefore, from the perspective of geomorphology, the river erosion triggered by the rapid decline in the local erosion base level is an important reason for the continuous shrinkage of Ebinur Lake. |
| first_indexed | 2024-04-13T12:10:54Z |
| format | Article |
| id | doaj.art-92f28cb546ec47c5b511276985cf2208 |
| institution | Directory Open Access Journal |
| issn | 1569-8432 |
| language | English |
| last_indexed | 2024-04-13T12:10:54Z |
| publishDate | 2021-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | International Journal of Applied Earth Observations and Geoinformation |
| spelling | doaj.art-92f28cb546ec47c5b511276985cf22082022-12-22T02:47:29ZengElsevierInternational Journal of Applied Earth Observations and Geoinformation1569-84322021-12-01104102546Impact of lake water level decline on river evolution in Ebinur Lake Basin (an ungauged terminal lake basin)Juan Wang0Shengtian Yang1Hezhen Lou2Huiping Liu3Pengfei Wang4Chaojun Li5Fei Zhang6School of Geography, Faculty of Geographical Science, Beijing Normal University, Beijing 100875, PR China; Soil and Water Conservation Monitoring Center of Pearl River Basin, Pearl River Water Resources Commission of the Ministry of Water Resources, Guangzhou 510611, ChinaCollege of Water Sciences, Beijing Normal University, Beijing 100875, PR China; Beijing Key Laboratory of Urban Hydrological Cycle and Sponge City Technology, Beijing 100875, PR China; Corresponding author.College of Water Sciences, Beijing Normal University, Beijing 100875, PR China; Beijing Key Laboratory of Urban Hydrological Cycle and Sponge City Technology, Beijing 100875, PR ChinaSchool of Geography, Faculty of Geographical Science, Beijing Normal University, Beijing 100875, PR China; Beijing Key Laboratory of Environmental Remote Sensing and Digital Cities, Beijing Normal University, Beijing 100875, PR ChinaCollege of Water Sciences, Beijing Normal University, Beijing 100875, PR China; School of Environment Science & Engineer, Southern University of Science and Technology, Shengzheng 518000, PR ChinaCollege of Water Sciences, Beijing Normal University, Beijing 100875, PR ChinaInstitute of Resources and Environment Science, Xinjiang University, Urumqi 830046, ChinaMost of the terminal lakes in inland basins, which account for half of the world's lake reserves, have been shrinking at an alarming rate in recent years. In a Terminal Lake Basin, changes in the water level of the lake can lead to variations in the local erosion base level. From the perspective of local erosion base level, we revealed the response of river evolution to change in the water level of lake in Ebinur Lake Basin for the past 5000 years. Our results verified the three geomorphic development stages of natural decline, balance maintenance, and imbalanced decline. In modern times, the decline in the number of rivers entering the lake due to human activities has made the water level of the lake drop 15–30 times that observed from 5 kaBP–0.1 kaBP. The results showed that the average undercut erosion rate of the river entering the lake tends to increase with a rapid decrease in the water level of the lake in the past 5000 years. The instantaneous undercutting rate of the Bortala river section in the basin was 1.6–4.2 times that observed from 5 kaBP–0.1 kaBP. This result showed that a rapid decline in the water level of the lake due to human activities will accelerate the erosion of rivers. Therefore, from the perspective of geomorphology, the river erosion triggered by the rapid decline in the local erosion base level is an important reason for the continuous shrinkage of Ebinur Lake.http://www.sciencedirect.com/science/article/pii/S0303243421002531Terminal lakeWater level of lakeUnmanned Aerial Vehicle (UAV)Fluvial terrace evolution |
| spellingShingle | Juan Wang Shengtian Yang Hezhen Lou Huiping Liu Pengfei Wang Chaojun Li Fei Zhang Impact of lake water level decline on river evolution in Ebinur Lake Basin (an ungauged terminal lake basin) International Journal of Applied Earth Observations and Geoinformation Terminal lake Water level of lake Unmanned Aerial Vehicle (UAV) Fluvial terrace evolution |
| title | Impact of lake water level decline on river evolution in Ebinur Lake Basin (an ungauged terminal lake basin) |
| title_full | Impact of lake water level decline on river evolution in Ebinur Lake Basin (an ungauged terminal lake basin) |
| title_fullStr | Impact of lake water level decline on river evolution in Ebinur Lake Basin (an ungauged terminal lake basin) |
| title_full_unstemmed | Impact of lake water level decline on river evolution in Ebinur Lake Basin (an ungauged terminal lake basin) |
| title_short | Impact of lake water level decline on river evolution in Ebinur Lake Basin (an ungauged terminal lake basin) |
| title_sort | impact of lake water level decline on river evolution in ebinur lake basin an ungauged terminal lake basin |
| topic | Terminal lake Water level of lake Unmanned Aerial Vehicle (UAV) Fluvial terrace evolution |
| url | http://www.sciencedirect.com/science/article/pii/S0303243421002531 |
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