Changes in Water Surface Area of the Lake in the Steppe Region of Mongolia: A Case Study of Ugii Nuur Lake, Central Mongolia
| Autor: | Hao Wang, Tianlin Qin, Tuvshin Gerelmaa, Byambabayar Ganbold, Sandelger Dorligjav, Asaminew Abiyu, Mohammed Gedefaw, Kun Wang, Baisha Weng, Erdenesukh Sumiya, Wuxia Bi, Batsuren Dorjsuren, Denghua Yan, Oyunbaatar Dambaravjaa, Altanbold Enkhbold, Yuheng Yang, Abel Girma |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
lcsh:Hydraulic engineering
Steppe Geography Planning and Development Drainage basin Aquatic Science precipitation Biochemistry evaporation lcsh:Water supply for domestic and industrial purposes lcsh:TC1-978 Precipitation Water Science and Technology Hydrology lcsh:TD201-500 geography geography.geographical_feature_category Discharge Global warming Mongolia air temperature Trend analysis water surface area Air temperature Environmental science river discharge Groundwater |
| Zdroj: | Water Volume 12 Issue 5 Water, Vol 12, Iss 1470, p 1470 (2020) |
| ISSN: | 2073-4441 |
| DOI: | 10.3390/w12051470 |
| Popis: | The Ugii Nuur Lake is not only one of the small hydrologically closed lakes located in the Orkhon River Basin in Central Mongolia but also the most vulnerable area for global climate change. Therefore, this study aims to investigate the impacts of recent global climate change on the water surface area. The data we analyzed were various measured hydro-meteorological variables of the lake basin and the lake surface area, which was estimated from Landsat series satellite data from 1986 to 2018. The methods we used were Mann-Kendall (MK), Innovative trend analysis method (ITAM), Sen&rsquo s slope estimator test, correlation, and regression analysis. The variation of lake water surface area has a strong positive correlation with the change of the lake water level (r = 0.95). The Mann-Kendall trend analysis has indicated that under a significant decrease in total annual precipitation ( = &minus 0.902) and inflow river discharge ( = &minus 5.392) and a considerable increase in total annual evaporation ( = 4.385) and annual average air temperature ( = 4.595), the surface area of the Ugii Nuur Lake has decreased sharply ( = &minus 6.021). The total annual evaporation (r = &minus 0.64) and inflow river discharge (r = 0.67) were the essential hydro-meteorological factors affecting the surface area of the Ugii Nuur Lake. The lake surface area decreased by 13.5% in 2018 compared with 1986. In the near future, it is vital to conduct scientific studies considering the volume of lake water, groundwater, and the anthropogenic impact. |
| Databáze: | OpenAIRE |
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