Assessing the Spatial Pattern of Irrigation Demand under Climate Change in Arid Area
| Autor: | Mohamed Khaled Salahou, Liping Wang, Liudong Zhang, Shufang Wang, Xiyun Jiao, Honghui Sang |
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| Rok vydání: | 2020 |
| Předmět: |
Irrigation
010504 meteorology & atmospheric sciences 0208 environmental biotechnology Geography Planning and Development lcsh:G1-922 Climate change 02 engineering and technology SEBS model 01 natural sciences Surface energy balance irrigation demand Earth and Planetary Sciences (miscellaneous) Farm water Computers in Earth Sciences 0105 earth and related environmental sciences hotan oasis Arid area spatial pattern Arid 020801 environmental engineering Water resources climate change Environmental science Common spatial pattern Water resource management lcsh:Geography (General) |
| Zdroj: | ISPRS International Journal of Geo-Information Volume 9 Issue 9 ISPRS International Journal of Geo-Information, Vol 9, Iss 506, p 506 (2020) |
| ISSN: | 2220-9964 |
| Popis: | Studying the pattern of agricultural water demand under climate change has great significance for the regional water resources management, especially in arid areas. In this study, the future pattern of the irrigation demand in Hotan Oasis in Xinjiang Uygur Autonomous Region in Northwest China, including Hotan City, Hotan County, Moyu County and Luopu County, was assessed based on the general circulation models (GCMs) and the Surface Energy Balance System model (SEBS). Six different scenarios were used based on the GCMs of BCC_CSM1.1, HadGEM2-ES and MIROC-ESM-CHEM under the Representative Concentration Pathway (RCP) 4.5 and RCP 8.5. The results showed that the method integrating the GCMs and SEBS to predict the spatial pattern was useful. The irrigation demand of Hotan Oasis will increase in 2021&ndash 2040. The annual irrigation demand of Hotan City is higher, with 923.2 and 936.2 mm/a in 2021&ndash 2030 and 2031&ndash 2040, respectively. The other three regions (Hotan County, Moyu County and Luopu County) are lower in the six scenarios. The annual irrigation demand showed a spatial pattern of high in the middle, low in the northwest and southeast under the six scenarios in 2021&ndash 2040. The study can provide useful suggestions on the water resources allocation in different regions to protect water resources security in arid areas. |
| Databáze: | OpenAIRE |
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