Arid Zone Research ›› 2021, Vol. 38 ›› Issue (6): 1579-1589.doi: 10.13866/j.azr.2021.06.10

• Weather and Climate • Previous Articles     Next Articles

Spatiotemporal variation characteristics of the water budget in Xinjiang during the latest 53 years

LU Baobao1(),SUN Huilan1(),JIANG Quanquan2,CAO Lijun1,LAN Xiaoli1,ZHANG Lele1,LIU Tianyi1   

  1. 1. College of Geography Science and Tourism, Xinjiang Normal University, Urumqi 830054, Xinjiang, China
    2. State Energy Group Xinjiang Jilintai Hydropower Development Co. Ltd, Ili 835700, Xinjiang, China
  • Received:2020-12-12 Revised:2021-02-16 Online:2021-11-15 Published:2021-11-29
  • Contact: Huilan SUN E-mail:3199861965@qq.com;hlsunxjnu@sina.com

Abstract:

Based on the daily meteorological data of 58 meteorological stations in Xinjiang from 1965 to 2017, the daily potential evapotranspiration was calculated using a Penman-Monteith (P-M) model, after which the water budget was calculated by combining precipitation data. Mann-Kendall (M-K) mutation test, wavelet analysis and Pearson correlation analysis were used to analyze temporal and spatial variation characteristics and factors influencing water content in Xinjiang. We found: (1) In the last 53 years, the interannual variation in the water budget in Xinjiang showed an overall increasing trend. The maximum increasing tendency rate of water budget was 93.69 mm·(10a)-1 in the south of the Tianshan Mountains, followed by a minimum 34.36 mm·(10a)-1in the north of the Tianshan Mountains, where the average increasing tendency rate was 72.28 mm·(10a)-1 in the whole Xinjiang. Seasonal variation in the water budget was as follows: summer > spring > autumn > winter. The linear variation rate in summer was a maximum 18.82 mm·(10a)-1and minimum 2.64 mm·(10a)-1 in winter. (2) Spatially, the maximum moisture loss for each season mainly occured in the surrounding areas of the Turpan Basin, Hami region and the northern area of Bayingolin Mongolian Autonomous Prefecture. The minimum value is mainly located in the Yili River Valley and Aletai area. Annua water surplus and deficist are increasing in most areas and decreasing in the north of Tianshan Mountains and some areas of the Tarim Basin. (3) There was a sudden change in the time series data for mean water surplus and deficit in Xinjiang around 1985 year. Since 2000, except for the area north of the Tianshan Mountains, the water surplus and deficit in other areas showed a clear decreasing trend, with a time period of 28 years as the first main period.

Key words: Xinjiang, water budget, Penman-Monteith model, climate change, spatio-time characteristics