JIN Jianxin,ZHANG Na,GUI Linguo.Temporal and Spatial Variations of the Drought Index to the Tibetan Plateau[J].Research of Soil and Water Conservation,2019,26(05):377-380.
西藏地区干旱指标的时空演变
- Title:
- Temporal and Spatial Variations of the Drought Index to the Tibetan Plateau
- Keywords:
- drought; Tibet; UNEP drought index; precipitation; precipitation concentration index; temporal and spatial variation
- 分类号:
- P343.1
- 摘要:
- 为明确西藏自治区干旱情况的时空变化特征，了解该地区气候变化规律，为该地区水资源的优化配置特别是农业水资源的高效利用提供依据。以西藏自治区为研究对象，根据37个气象站点从1981—2012年的逐日气象观测资料，对西藏32 a的UNEP干旱指数、降水、降水集中指数PCI进行了时空变化规律研究。结果表明：干旱程度随时间推移递减，UNEP干旱指数从西到东逐渐增大，整个区域从西到东依次由特干旱气候区向湿润半湿润及湿润气候区过渡。降水量从西部地区到东南部地区逐渐增大，年均降水量从68.8 mm增大到700 mm。西藏地区年内降水量的季度集中性从东南到西北地区越来越高。研究为西藏自治区大范围的水资源管理和农业灌溉提供实践依据。
- Abstract:
- This study is to clarify the temporal and spatial variation characteristics of drought conditions in Tibet Autonomous Region, to understand the climate change patterns in this region, and to provide the basis for the optimal allocation of water resources in this region, especially the efficient use of agricultural water resources. The Tibet Autonomous Region was selected as the study area. Based on the daily meteorological data of 37 meteorological stations from 1981 to 2012 years, the spatiotemporal variations of UNEP drought index, precipitation and precipitation centration index(PCI) were examined. The drought degree gradually decreased over time. UNEP drought index gradually increased from west to east. The entire region from west to east progressively varied from the special arid zone to semi-humid climate zone and humid climate zone. Precipitations gradually increased from the west to the southeast, and the average annual precipitation increased from 68.8 mm to 700 mm. The concentrations of the quarterly precipitation increased from southeast to northwest region. This study can provide the practical foundations for a wide range of irrigation management and water use in Tibet Autonomous Region.
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备注/Memo
收稿日期:2018-10-29;改回日期:2018-11-19。
基金项目:宁夏科技人才托举工程项目：宁夏回族自治区重点研发计划项目“优势粮食绿色丰产增效关键技术研究与示范”（2018BBF02018）
作者简介:金建新(1988-),男,甘肃定西人,助理研究员,主要从事节水灌溉和水资源高效利用研究。E-mail:jinnxnk009@163.com
通讯作者:桂林国(1963-),男,宁夏吴忠人,本科,研究员,主要从事节水灌溉与土壤培肥。E-mail:834887265@qq.com