Informatics Publishing Limited

Yang Liu ¹, Xian-Yong Meng ¹, Zhi-Hui Liu ², Dan-Lin Yu ³

Affiliations
1 School of Resources and Environment Science, Xinjiang University, Urumqi, 830046, CN
2 Key Laboratory of Oasis Ecology Ministry of Education, Xinjiang University, 830046, CN
3 Department of Earth & Environmental Studies, Montclair State University, Montclair, NJ, 07043, US

Abstract

Mountain flood that causes landslide and other geological disasters can damage the fragile ecological environment in mountain areas. In this paper, threshold and distribution model of accumulated temperature based on snowmelt flood magnitude are designed in mountainous watershed. Meanwhile, input data for this model make use of ample reliable data that include remote sensing and so on. In detail, this model simulates the average watershed temperature by using the meteorologic re-analysis data of the National Center for Atmospheric Research and calculates the average snow depth by using hyperspectral remote sensing data. In addition, the model related data comprise long-term observation experiments of the watershed, including the characteristics of accumulated snow and result of correlation between runoff and infiltration in runoff simulation experiment through distributed hydrological models (i.e., Soil and Water Assessment Tool and Distributed Hydrology Soil Vegetation Model). Finally, the average accumulated temperature of the watershed that causes snowmelt flood can be obtained through the aforementioned method, and the characteristics of the accumulated temperature distribution of the watershed area are determined based on the temperature lapse rate. The characteristics of accumulated temperature distribution can provide decision-making reference for monitoring the ecological environment in mountain areas and preventing and reducing disasters.

Keywords

Inverse Hydrological Problem, Flood Magnitude, Cropland Environment, Accumulated Temperature, Distribution, Accumulated Temperature, Threshold.

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Xian-Yong Meng ¹, Xiao-Nan Ji ², Zhi-Hui Liu ³, Xi Chen ⁴, Shi-Feng Fang ⁵

Affiliations
1 School of Resources and Environment Science, Xinjiang University, Urumqi 830046, CN
2 Jiang An Campus of Sichuan University, College of Architecture and Environment, Chengdu, 6102075, CN
3 Key Laboratory of Oasis Ecology, Ministry of Education, Xinjiang University, Urumqi 830046, CN
4 Xinjiang Institute of Ecology and Geography, Chinese Academy of Science, Urumqi 830011, CN
5 LREIS, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Science, Beijing 100101, CN

Abstract

A major proportion of discharge in the Juntanghu river basin is contributed by its glacier-fed river and snow catchments situated in northern mid-slope of Tianshan Mountain, Northwest China. The Mann-Kendall trend test based on the 50 years data (1961 to 2011) were used for analysis of the climate change trends and the application of the SWAT model under different climate change scenarios show that watershed hydrological cycle would alter under different climatic scenarios. This suggests that the reservoirs will be necessary for large flow storage to meet the need of the flood control, water supply, etc.

Keywords

Snowmelt Runoff, SWAT Analysis, Climate Change Effect, Tianshan Mountain.

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