Combined impacts of climate change and human activities on blue and green water resources in a high-intensity development watershed
<p>Sustainable management of blue and green water resources is vital for the stability and sustainability of watershed ecosystems. Although there has been extensive attention paid to blue water (BW), which is closely related to human beings, the relevance of green water (GW) to ecosystem secur...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2025-01-01
|
| Series: | Hydrology and Earth System Sciences |
| Online Access: | https://hess.copernicus.org/articles/29/427/2025/hess-29-427-2025.pdf |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832591487819317248 |
|---|---|
| author | X. Tan B. Liu X. Tan X. Tan Z. Huang J. Fu |
| author_facet | X. Tan B. Liu X. Tan X. Tan Z. Huang J. Fu |
| author_sort | X. Tan |
| collection | DOAJ |
| description | <p>Sustainable management of blue and green water resources is vital for the stability and sustainability of watershed ecosystems. Although there has been extensive attention paid to blue water (BW), which is closely related to human beings, the relevance of green water (GW) to ecosystem security is typically disregarded in water resource evaluations. Specifically, comprehensive studies are scarce on the detection and attribution of variations of blue and green water in the Dongjiang River basin (DRB), an important source of regional water supply in the Guangdong–Hong Kong–Macao Greater Bay Area (GBA) of China. Here we assess the variations of BW and GW scarcity and quantify the impacts of climate change and land use change on BW and GW in DRB using the multi-water-flux calibrated Soil and Water Assessment Tool (SWAT). Results show that BW and green water storage (GWS) in DRB increased slowly at rates of 0.14 and 0.015 mm a<span class="inline-formula"><sup>−1</sup></span>, respectively, while green water flow (GWF) decreased significantly at a rate of <span class="inline-formula">−0.21</span> mm a<span class="inline-formula"><sup>−1</sup></span>. The degree of BW and GW scarcity in DRB is low, and the per capita water resources in more than 80 % of DRB exceed 1700 m<span class="inline-formula"><sup>3</sup></span> per capita per year. Attribution results show that 88.0 %, 88.5 %, and 39.4 % of changes in BW, GWF, and GWS result from climate change. Both climate change and land use change have decreased BW, while climate change (land use change) has decreased (increased) GWF in DRB. These findings can guide the optimization of the allocation of blue and green water resources between upper and lower reach areas in DRB and further improve the understanding of blue and green water evolution patterns in humid regions.</p> |
| format | Article |
| id | doaj-art-fcf755a1205d4c97808358d68a518049 |
| institution | Kabale University |
| issn | 1027-5606 1607-7938 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Hydrology and Earth System Sciences |
| spelling | doaj-art-fcf755a1205d4c97808358d68a5180492025-01-22T11:38:26ZengCopernicus PublicationsHydrology and Earth System Sciences1027-56061607-79382025-01-012942744510.5194/hess-29-427-2025Combined impacts of climate change and human activities on blue and green water resources in a high-intensity development watershedX. Tan0B. Liu1X. Tan2X. Tan3Z. Huang4J. Fu5School of Geography and Planning, Sun Yat-sen University, Guangzhou, 510006, PR ChinaCenter of Water Resources and Environment, School of Civil Engineering, Sun Yat-sen University, Guangzhou, 510275, PR ChinaCenter of Water Resources and Environment, School of Civil Engineering, Sun Yat-sen University, Guangzhou, 510275, PR ChinaSouthern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Sun Yat-sen University, Zhuhai, 519082, PR ChinaCenter of Water Resources and Environment, School of Civil Engineering, Sun Yat-sen University, Guangzhou, 510275, PR ChinaCenter of Water Resources and Environment, School of Civil Engineering, Sun Yat-sen University, Guangzhou, 510275, PR China<p>Sustainable management of blue and green water resources is vital for the stability and sustainability of watershed ecosystems. Although there has been extensive attention paid to blue water (BW), which is closely related to human beings, the relevance of green water (GW) to ecosystem security is typically disregarded in water resource evaluations. Specifically, comprehensive studies are scarce on the detection and attribution of variations of blue and green water in the Dongjiang River basin (DRB), an important source of regional water supply in the Guangdong–Hong Kong–Macao Greater Bay Area (GBA) of China. Here we assess the variations of BW and GW scarcity and quantify the impacts of climate change and land use change on BW and GW in DRB using the multi-water-flux calibrated Soil and Water Assessment Tool (SWAT). Results show that BW and green water storage (GWS) in DRB increased slowly at rates of 0.14 and 0.015 mm a<span class="inline-formula"><sup>−1</sup></span>, respectively, while green water flow (GWF) decreased significantly at a rate of <span class="inline-formula">−0.21</span> mm a<span class="inline-formula"><sup>−1</sup></span>. The degree of BW and GW scarcity in DRB is low, and the per capita water resources in more than 80 % of DRB exceed 1700 m<span class="inline-formula"><sup>3</sup></span> per capita per year. Attribution results show that 88.0 %, 88.5 %, and 39.4 % of changes in BW, GWF, and GWS result from climate change. Both climate change and land use change have decreased BW, while climate change (land use change) has decreased (increased) GWF in DRB. These findings can guide the optimization of the allocation of blue and green water resources between upper and lower reach areas in DRB and further improve the understanding of blue and green water evolution patterns in humid regions.</p>https://hess.copernicus.org/articles/29/427/2025/hess-29-427-2025.pdf |
| spellingShingle | X. Tan B. Liu X. Tan X. Tan Z. Huang J. Fu Combined impacts of climate change and human activities on blue and green water resources in a high-intensity development watershed Hydrology and Earth System Sciences |
| title | Combined impacts of climate change and human activities on blue and green water resources in a high-intensity development watershed |
| title_full | Combined impacts of climate change and human activities on blue and green water resources in a high-intensity development watershed |
| title_fullStr | Combined impacts of climate change and human activities on blue and green water resources in a high-intensity development watershed |
| title_full_unstemmed | Combined impacts of climate change and human activities on blue and green water resources in a high-intensity development watershed |
| title_short | Combined impacts of climate change and human activities on blue and green water resources in a high-intensity development watershed |
| title_sort | combined impacts of climate change and human activities on blue and green water resources in a high intensity development watershed |
| url | https://hess.copernicus.org/articles/29/427/2025/hess-29-427-2025.pdf |
| work_keys_str_mv | AT xtan combinedimpactsofclimatechangeandhumanactivitiesonblueandgreenwaterresourcesinahighintensitydevelopmentwatershed AT bliu combinedimpactsofclimatechangeandhumanactivitiesonblueandgreenwaterresourcesinahighintensitydevelopmentwatershed AT xtan combinedimpactsofclimatechangeandhumanactivitiesonblueandgreenwaterresourcesinahighintensitydevelopmentwatershed AT xtan combinedimpactsofclimatechangeandhumanactivitiesonblueandgreenwaterresourcesinahighintensitydevelopmentwatershed AT zhuang combinedimpactsofclimatechangeandhumanactivitiesonblueandgreenwaterresourcesinahighintensitydevelopmentwatershed AT jfu combinedimpactsofclimatechangeandhumanactivitiesonblueandgreenwaterresourcesinahighintensitydevelopmentwatershed |