Comparative Study on Temperature Response of Hydropower Development in the Dry‐Hot Valley
Abstract Due to the specific hydrothermal conditions of dry‐hot valleys, temperature changes caused by the development of large‐scale hydropower projects may be more extreme than they are in other regions. In this study, we analyzed these temperature changes at four hydropower stations in both dry‐h...
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
American Geophysical Union (AGU)
2021-07-01
|
| Series: | GeoHealth |
| Subjects: | |
| Online Access: | https://doi.org/10.1029/2021GH000438 |
| _version_ | 1819028360739684352 |
|---|---|
| author | D. C. Wang X. Zhang Y. Huang X. Wang W. Zhang Z. J. Cao Y. Xin M. Qu |
| author_facet | D. C. Wang X. Zhang Y. Huang X. Wang W. Zhang Z. J. Cao Y. Xin M. Qu |
| author_sort | D. C. Wang |
| collection | DOAJ |
| description | Abstract Due to the specific hydrothermal conditions of dry‐hot valleys, temperature changes caused by the development of large‐scale hydropower projects may be more extreme than they are in other regions. In this study, we analyzed these temperature changes at four hydropower stations in both dry‐hot and non‐dry‐hot valleys. Based on the calculated relative temperatures of the downstream river and the areas surrounding the reservoirs, we employed two indices to quantify the influence of the reservoirs on the temperatures of these two regions: the downstream river temperature change and the reservoir effect change intensity. Our results are as follows: (a) In the downstream rivers, the temperature regulation effect was more pronounced in the wet season; in the regions surrounding the reservoirs, the temperature regulation effect was more pronounced in the dry season. (b) The downstream river temperature in both the dry‐hot and wet‐hot valleys exhibited noticeable warming in both the wet and dry seasons, while the cold‐dry valley was characterized by cooling in the dry season and warming in the wet season. With the exception of the Liyuan station (where the influence of the reservoir on the downstream temperatures only extended to a distance of 9 km from the dam) during the dry season, the existence of the hydropower stations affected the temperatures of the entire downstream region. (c) For the areas surrounding the reservoir, the presence of a hydropower station mainly caused the temperatures in the dry‐hot valleys to rise and the temperatures in the non‐dry‐hot valleys to decrease. |
| first_indexed | 2024-12-21T05:57:08Z |
| format | Article |
| id | doaj.art-b24795b74b064775871f123d120f5c98 |
| institution | Directory Open Access Journal |
| issn | 2471-1403 |
| language | English |
| last_indexed | 2024-12-21T05:57:08Z |
| publishDate | 2021-07-01 |
| publisher | American Geophysical Union (AGU) |
| record_format | Article |
| series | GeoHealth |
| spelling | doaj.art-b24795b74b064775871f123d120f5c982022-12-21T19:13:50ZengAmerican Geophysical Union (AGU)GeoHealth2471-14032021-07-0157n/an/a10.1029/2021GH000438Comparative Study on Temperature Response of Hydropower Development in the Dry‐Hot ValleyD. C. Wang0X. Zhang1Y. Huang2X. Wang3W. Zhang4Z. J. Cao5Y. Xin6M. Qu7School of Geology and Geomatics Tianjin Chengjian University Tianjin ChinaSchool of Geology and Geomatics Tianjin Chengjian University Tianjin ChinaInstitute of International Rivers and Ecosecurity Yunnan University Kunming ChinaSchool of Geology and Geomatics Tianjin Chengjian University Tianjin ChinaSchool of Geology and Geomatics Tianjin Chengjian University Tianjin ChinaSchool of Geology and Geomatics Tianjin Chengjian University Tianjin ChinaSchool of Geology and Geomatics Tianjin Chengjian University Tianjin ChinaSchool of Geology and Geomatics Tianjin Chengjian University Tianjin ChinaAbstract Due to the specific hydrothermal conditions of dry‐hot valleys, temperature changes caused by the development of large‐scale hydropower projects may be more extreme than they are in other regions. In this study, we analyzed these temperature changes at four hydropower stations in both dry‐hot and non‐dry‐hot valleys. Based on the calculated relative temperatures of the downstream river and the areas surrounding the reservoirs, we employed two indices to quantify the influence of the reservoirs on the temperatures of these two regions: the downstream river temperature change and the reservoir effect change intensity. Our results are as follows: (a) In the downstream rivers, the temperature regulation effect was more pronounced in the wet season; in the regions surrounding the reservoirs, the temperature regulation effect was more pronounced in the dry season. (b) The downstream river temperature in both the dry‐hot and wet‐hot valleys exhibited noticeable warming in both the wet and dry seasons, while the cold‐dry valley was characterized by cooling in the dry season and warming in the wet season. With the exception of the Liyuan station (where the influence of the reservoir on the downstream temperatures only extended to a distance of 9 km from the dam) during the dry season, the existence of the hydropower stations affected the temperatures of the entire downstream region. (c) For the areas surrounding the reservoir, the presence of a hydropower station mainly caused the temperatures in the dry‐hot valleys to rise and the temperatures in the non‐dry‐hot valleys to decrease.https://doi.org/10.1029/2021GH000438dry‐hot valleycomparative studyrelative temperaturedownstream river temperature changereservoir effect change intensity |
| spellingShingle | D. C. Wang X. Zhang Y. Huang X. Wang W. Zhang Z. J. Cao Y. Xin M. Qu Comparative Study on Temperature Response of Hydropower Development in the Dry‐Hot Valley GeoHealth dry‐hot valley comparative study relative temperature downstream river temperature change reservoir effect change intensity |
| title | Comparative Study on Temperature Response of Hydropower Development in the Dry‐Hot Valley |
| title_full | Comparative Study on Temperature Response of Hydropower Development in the Dry‐Hot Valley |
| title_fullStr | Comparative Study on Temperature Response of Hydropower Development in the Dry‐Hot Valley |
| title_full_unstemmed | Comparative Study on Temperature Response of Hydropower Development in the Dry‐Hot Valley |
| title_short | Comparative Study on Temperature Response of Hydropower Development in the Dry‐Hot Valley |
| title_sort | comparative study on temperature response of hydropower development in the dry hot valley |
| topic | dry‐hot valley comparative study relative temperature downstream river temperature change reservoir effect change intensity |
| url | https://doi.org/10.1029/2021GH000438 |
| work_keys_str_mv | AT dcwang comparativestudyontemperatureresponseofhydropowerdevelopmentinthedryhotvalley AT xzhang comparativestudyontemperatureresponseofhydropowerdevelopmentinthedryhotvalley AT yhuang comparativestudyontemperatureresponseofhydropowerdevelopmentinthedryhotvalley AT xwang comparativestudyontemperatureresponseofhydropowerdevelopmentinthedryhotvalley AT wzhang comparativestudyontemperatureresponseofhydropowerdevelopmentinthedryhotvalley AT zjcao comparativestudyontemperatureresponseofhydropowerdevelopmentinthedryhotvalley AT yxin comparativestudyontemperatureresponseofhydropowerdevelopmentinthedryhotvalley AT mqu comparativestudyontemperatureresponseofhydropowerdevelopmentinthedryhotvalley |