LAKE AREA CHANGE OF CHAHANNUR LAKE AND ITS RESPONSES TO CLIMATE CHANGE

WANG Yixuan; XING Shilu; DING Ning

doi:10.13205/j.hjgc.202211007

Volume 40 Issue 11

Nov. 2022

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WANG Yixuan, XING Shilu, DING Ning. LAKE AREA CHANGE OF CHAHANNUR LAKE AND ITS RESPONSES TO CLIMATE CHANGE[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(11): 47-53,68. doi: 10.13205/j.hjgc.202211007

Citation:

WANG Yixuan, XING Shilu, DING Ning. LAKE AREA CHANGE OF CHAHANNUR LAKE AND ITS RESPONSES TO CLIMATE CHANGE[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(11): 47-53,68. doi: 10.13205/j.hjgc.202211007

WANG Yixuan, XING Shilu, DING Ning. LAKE AREA CHANGE OF CHAHANNUR LAKE AND ITS RESPONSES TO CLIMATE CHANGE[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(11): 47-53,68. doi: 10.13205/j.hjgc.202211007

Citation:

WANG Yixuan, XING Shilu, DING Ning. LAKE AREA CHANGE OF CHAHANNUR LAKE AND ITS RESPONSES TO CLIMATE CHANGE[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(11): 47-53,68. doi: 10.13205/j.hjgc.202211007

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LAKE AREA CHANGE OF CHAHANNUR LAKE AND ITS RESPONSES TO CLIMATE CHANGE

doi: 10.13205/j.hjgc.202211007

1. College of Energy and Power Engineering, Inner Mongolia University of Technology, Hohhot 010000, China;
2. Biological Disaster Prevention and Control Center of State Forestry and Grassland Administration, Shenyang 110000, China

Received Date: 2021-12-06
Available Online: 2023-03-24

Abstract

Abstract

The Chahannur lake Basin was taken as the research object of this paper. By extracting the lake areas of the Chahannur during the wet season of 31 years from 1990 to 2020 using Landsat images by modified normalized difference water index (MNDWI) combined with the method of visual interpretation, the evolution law of the lake area was obtained. Based on the monthly temperature, precipitation, evaporation and relative humidity data of Huade, Shangyi and Shangdu meteorological stations, the linear trend estimation method and Mann-Kendall test method were used to analyze the changing trend of climate factors. Principal component analysis and correlation analysis were used to explain the response of the lake area to climate factors. The results showed that:1) In the past 31 years, the Chahannur lake Basin has presented a warming and drying trend of rising temperature, decreasing precipitation and increasing evaporation; 2) the area of the Chahannur lake experienced four stages of stability, decrease, increase, and decrease again, and the water surface area of the Chahannur lake showed a downward trend as a whole between 1990 to 2020. During the 31 years, the lake area was 49.72 square kilometers at its maximum and 0.074 square kilometers at its minimum; 3) lake area respond quickly to climate. The increase of evaporation and decrease of precipitation in summer resulted in a significant decrease in relative humidity, which was the main factor affecting the lake area in the wet season and causing the obvious seasonal variation of the Chahannur lake.
- the Chahannur lake,
- lake area,
- climatic factors,
- principal component analysis,
- correlation analysis

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References(36)

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