Study on the effect of front retaining walls on the thermal structure and outflow temperature of reservoirs.
The front retaining wall (FRW) is an effective facility of selective withdrawal. Previous research has not estimated the effect of FRWs on the thermal regimes of reservoirs and outflow temperature, which are crucial to reservoir ecology. For this purpose, taking the Dongqing Reservoir as a case stud...
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Public Library of Science (PLoS)
2021-01-01
|
| Series: | PLoS ONE |
| Online Access: | https://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0260779&type=printable |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850235673266618368 |
|---|---|
| author | Xiaoqian Yang Youcai Tuo Yanjing Yang Xin Wang Yun Deng Haoyu Wang |
| author_facet | Xiaoqian Yang Youcai Tuo Yanjing Yang Xin Wang Yun Deng Haoyu Wang |
| author_sort | Xiaoqian Yang |
| collection | DOAJ |
| description | The front retaining wall (FRW) is an effective facility of selective withdrawal. Previous research has not estimated the effect of FRWs on the thermal regimes of reservoirs and outflow temperature, which are crucial to reservoir ecology. For this purpose, taking the Dongqing Reservoir as a case study, a two-dimensional hydrodynamic CE-QUAL-W2 model was configured for the typical channel-type reservoir in the southwestern Guizhou Province, to better understand the influence of FRWs on the thermal structure and outflow temperature. The simulated data from January to September 2017 showed that FRWs can change the vertical temperature distribution during the stratification period, accelerate the upper warmer water release and thus decrease the strength of thermal stratification. The stratification structure changed from a single thermocline to double thermoclines in August. An FRW resulted in an average 11.8 m increase in the thickness of the hypolimnion and a 1.2°C decrease in the thickness of the thermocline layer. An FRW increased the outflow temperature by 0.4°C and raised the withdrawal elevation by 16 m on average. The longitudinal velocity increased compared with the non-FRW condition, while the maximum velocity position moved up. In addition, FRWs can continuously obtain surface warmer water without manual operation and have low investment and good construction conditions. This study can provide an available selective withdrawal idea for reservoirs with similar hydraulic conditions. |
| format | Article |
| id | doaj-art-2e7fe8ecb9954990ae1594033a0dc2b7 |
| institution | OA Journals |
| issn | 1932-6203 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Public Library of Science (PLoS) |
| record_format | Article |
| series | PLoS ONE |
| spelling | doaj-art-2e7fe8ecb9954990ae1594033a0dc2b72025-08-20T02:02:10ZengPublic Library of Science (PLoS)PLoS ONE1932-62032021-01-011612e026077910.1371/journal.pone.0260779Study on the effect of front retaining walls on the thermal structure and outflow temperature of reservoirs.Xiaoqian YangYoucai TuoYanjing YangXin WangYun DengHaoyu WangThe front retaining wall (FRW) is an effective facility of selective withdrawal. Previous research has not estimated the effect of FRWs on the thermal regimes of reservoirs and outflow temperature, which are crucial to reservoir ecology. For this purpose, taking the Dongqing Reservoir as a case study, a two-dimensional hydrodynamic CE-QUAL-W2 model was configured for the typical channel-type reservoir in the southwestern Guizhou Province, to better understand the influence of FRWs on the thermal structure and outflow temperature. The simulated data from January to September 2017 showed that FRWs can change the vertical temperature distribution during the stratification period, accelerate the upper warmer water release and thus decrease the strength of thermal stratification. The stratification structure changed from a single thermocline to double thermoclines in August. An FRW resulted in an average 11.8 m increase in the thickness of the hypolimnion and a 1.2°C decrease in the thickness of the thermocline layer. An FRW increased the outflow temperature by 0.4°C and raised the withdrawal elevation by 16 m on average. The longitudinal velocity increased compared with the non-FRW condition, while the maximum velocity position moved up. In addition, FRWs can continuously obtain surface warmer water without manual operation and have low investment and good construction conditions. This study can provide an available selective withdrawal idea for reservoirs with similar hydraulic conditions.https://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0260779&type=printable |
| spellingShingle | Xiaoqian Yang Youcai Tuo Yanjing Yang Xin Wang Yun Deng Haoyu Wang Study on the effect of front retaining walls on the thermal structure and outflow temperature of reservoirs. PLoS ONE |
| title | Study on the effect of front retaining walls on the thermal structure and outflow temperature of reservoirs. |
| title_full | Study on the effect of front retaining walls on the thermal structure and outflow temperature of reservoirs. |
| title_fullStr | Study on the effect of front retaining walls on the thermal structure and outflow temperature of reservoirs. |
| title_full_unstemmed | Study on the effect of front retaining walls on the thermal structure and outflow temperature of reservoirs. |
| title_short | Study on the effect of front retaining walls on the thermal structure and outflow temperature of reservoirs. |
| title_sort | study on the effect of front retaining walls on the thermal structure and outflow temperature of reservoirs |
| url | https://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0260779&type=printable |
| work_keys_str_mv | AT xiaoqianyang studyontheeffectoffrontretainingwallsonthethermalstructureandoutflowtemperatureofreservoirs AT youcaituo studyontheeffectoffrontretainingwallsonthethermalstructureandoutflowtemperatureofreservoirs AT yanjingyang studyontheeffectoffrontretainingwallsonthethermalstructureandoutflowtemperatureofreservoirs AT xinwang studyontheeffectoffrontretainingwallsonthethermalstructureandoutflowtemperatureofreservoirs AT yundeng studyontheeffectoffrontretainingwallsonthethermalstructureandoutflowtemperatureofreservoirs AT haoyuwang studyontheeffectoffrontretainingwallsonthethermalstructureandoutflowtemperatureofreservoirs |