The impacts of climate changes on watershed streamflow and total dissolved nitrogen in Danjiang Watershed, China
The impacts of future climate change on the watershed streamflow and total dissolved nitrogen (TDN) fluxes upstream of the Danjiang River were estimated. The newest shared socioeconomic pathways (SSP) in CMIP6 were used as a climate change scenario. The ensembles of downscaled GCM outputs from World...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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IWA Publishing
2023-01-01
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| Series: | Journal of Water and Climate Change |
| Subjects: | |
| Online Access: | http://jwcc.iwaponline.com/content/14/1/104 |
| _version_ | 1797202827063328768 |
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| author | Yaxiu Liu Xinyu Chen Han Gao Jian Sha Xue Li |
| author_facet | Yaxiu Liu Xinyu Chen Han Gao Jian Sha Xue Li |
| author_sort | Yaxiu Liu |
| collection | DOAJ |
| description | The impacts of future climate change on the watershed streamflow and total dissolved nitrogen (TDN) fluxes upstream of the Danjiang River were estimated. The newest shared socioeconomic pathways (SSP) in CMIP6 were used as a climate change scenario. The ensembles of downscaled GCM outputs from WorldClim were used as future climate change information. A combined modeling approach is proposed, including the Long Ashton Research Station Weather Generator (LARS-WG) model as a weather generator and the generalized watershed loading function (GWLF) model for watershed hydrochemical process model and scenario analysis. The results show that there is generally less annual streamflow but more annual TDN flux under future climate change scenarios. The monthly streamflow and TDN flux increased from May to July and decreased from August to October. Changes in streamflow and TDN fluxes were the greatest in the worst uncontrolled scenario of SSP 5-85, with a 12.1% decrease in annual streamflow in the 2070s and a 4.82% increase in annual TDN flux in the 2090s. This indicates that active climate policies can mitigate the impact of climate change on watersheds. Furthermore, the source apportionments of TDN from agricultural sources will increase to nearly 50% by the 2090s, and targeted management strategies should be implemented.
HIGHLIGHTS
The newest CMIP6 climate change scenarios are used to estimate watershed responses.;
An approach for quick perspective of climate change impact on watershed is proposed.;
Positive climate policies can mitigate the impacts of climate change on watersheds.; |
| first_indexed | 2024-04-10T09:33:11Z |
| format | Article |
| id | doaj.art-889b120524ff4c3ba50c15c26b8a0fb0 |
| institution | Directory Open Access Journal |
| issn | 2040-2244 2408-9354 |
| language | English |
| last_indexed | 2024-04-24T08:09:37Z |
| publishDate | 2023-01-01 |
| publisher | IWA Publishing |
| record_format | Article |
| series | Journal of Water and Climate Change |
| spelling | doaj.art-889b120524ff4c3ba50c15c26b8a0fb02024-04-17T08:12:16ZengIWA PublishingJournal of Water and Climate Change2040-22442408-93542023-01-0114110412210.2166/wcc.2022.213213The impacts of climate changes on watershed streamflow and total dissolved nitrogen in Danjiang Watershed, ChinaYaxiu Liu0Xinyu Chen1Han Gao2Jian Sha3Xue Li4 Hangzhou Huanyan Technology Co., Ltd, Hangzhou 311122, China Tianjin Key Laboratory of Water Resources and Environment, Tianjin Normal University, Tianjin 300387, China Institute of Water Ecology and Environment, Chinese Academy of Environmental Planning, Beijing 100041, China Tianjin Key Laboratory of Water Resources and Environment, Tianjin Normal University, Tianjin 300387, China Tianjin Key Laboratory of Water Resources and Environment, Tianjin Normal University, Tianjin 300387, China The impacts of future climate change on the watershed streamflow and total dissolved nitrogen (TDN) fluxes upstream of the Danjiang River were estimated. The newest shared socioeconomic pathways (SSP) in CMIP6 were used as a climate change scenario. The ensembles of downscaled GCM outputs from WorldClim were used as future climate change information. A combined modeling approach is proposed, including the Long Ashton Research Station Weather Generator (LARS-WG) model as a weather generator and the generalized watershed loading function (GWLF) model for watershed hydrochemical process model and scenario analysis. The results show that there is generally less annual streamflow but more annual TDN flux under future climate change scenarios. The monthly streamflow and TDN flux increased from May to July and decreased from August to October. Changes in streamflow and TDN fluxes were the greatest in the worst uncontrolled scenario of SSP 5-85, with a 12.1% decrease in annual streamflow in the 2070s and a 4.82% increase in annual TDN flux in the 2090s. This indicates that active climate policies can mitigate the impact of climate change on watersheds. Furthermore, the source apportionments of TDN from agricultural sources will increase to nearly 50% by the 2090s, and targeted management strategies should be implemented. HIGHLIGHTS The newest CMIP6 climate change scenarios are used to estimate watershed responses.; An approach for quick perspective of climate change impact on watershed is proposed.; Positive climate policies can mitigate the impacts of climate change on watersheds.;http://jwcc.iwaponline.com/content/14/1/104climate changecmip6gwlflars-wgwatershed |
| spellingShingle | Yaxiu Liu Xinyu Chen Han Gao Jian Sha Xue Li The impacts of climate changes on watershed streamflow and total dissolved nitrogen in Danjiang Watershed, China Journal of Water and Climate Change climate change cmip6 gwlf lars-wg watershed |
| title | The impacts of climate changes on watershed streamflow and total dissolved nitrogen in Danjiang Watershed, China |
| title_full | The impacts of climate changes on watershed streamflow and total dissolved nitrogen in Danjiang Watershed, China |
| title_fullStr | The impacts of climate changes on watershed streamflow and total dissolved nitrogen in Danjiang Watershed, China |
| title_full_unstemmed | The impacts of climate changes on watershed streamflow and total dissolved nitrogen in Danjiang Watershed, China |
| title_short | The impacts of climate changes on watershed streamflow and total dissolved nitrogen in Danjiang Watershed, China |
| title_sort | impacts of climate changes on watershed streamflow and total dissolved nitrogen in danjiang watershed china |
| topic | climate change cmip6 gwlf lars-wg watershed |
| url | http://jwcc.iwaponline.com/content/14/1/104 |
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