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中国农学通报 ›› 2018, Vol. 34 ›› Issue (19): 96-101.doi: 10.11924/j.issn.1000-6850.casb18020079

所属专题: 耕地保护

• 资源 环境 生态 土壤 气象 • 上一篇    下一篇

宁夏沙漠化土地动态监测研究

王东清,温学飞   

  1. 宁夏农林科学院荒漠化治理研究所 宁夏银川 750002,宁夏农林科学院荒漠化治理研究所 宁夏银川 750002
  • 收稿日期:2018-02-24 修回日期:2018-05-15 接受日期:2018-05-24 出版日期:2018-07-11 发布日期:2018-07-11
  • 通讯作者: 温学飞
  • 基金资助:
    宁夏农科院科技创新先导资金项目“基于节水根灌下沙地葡萄、梭梭耗水规律研究” (NKYJ-16-16);宁夏科技支撑项目“宁夏土地沙漠化动态监测及预警机制研究” (2013ZYS176);国家自然科学基金“基于稳定同位素技术的河东沙地植物水分利用研究”(31360110)。

Dynamic Monitoring of Desertification Land in Ningxia

  • Received:2018-02-24 Revised:2018-05-15 Accepted:2018-05-24 Online:2018-07-11 Published:2018-07-11

摘要: 为掌握宁夏土地沙漠化动态发展趋势,以期为宁夏沙漠化土地治理提供数据支撑。本研究采用野外调查结合遥感技术方法监测宁夏土地沙漠化发展情况,利用ArcGIS软件解译并绘制沙漠化土地现状及分级情况图。结果表明:2014 年宁夏沙漠化土地总面积为112.03 万hm2,1994—2014 年沙漠化土地面积减少13.57 万hm2,下降了10.8%,下降趋势明显。土地沙漠化程度总体趋势是由极重度—重度—中度—轻度流转,其中2014 年轻度沙化、中度沙化、重度沙化和极重度沙化面积分别为75.23 万hm2、20.80万hm2、8.10 万hm2、7.89 万hm2。土地沙漠化程度变化最为敏感的区域主要位于大武口区、平罗县、贺兰县、银川市、灵武市北部、中宁县和沙坡头区,分布于240 mm等雨线以西区域,是未来生态环境监测、评价和治理需高度重视的地区。

关键词: 美国白蛾, 美国白蛾, 自然种群, 生命表

Abstract: The paper aims to master the dynamic development tendency of the desertification land in Ningxia, to provide data supporting for desertification land control. The desertification land in Ningxia was monitored by means of field investigation and remote sensing, and the status and classification of the desertification land was mapped by using ArcGIS. The results showed that: the total area of desertification land in Ningxia was 1120.3 × 103 hm2 in 2014, and the area was reduced by 135.7×103 hm2 from 1994 to 2014, which decreased by 10.8% during these 20 years. The general trend of land desertification development was from extremely severe to severe to moderate to mild, and the mild, moderate, severe and extremely severe desertification areas was 752.3×103, 208.0×103, 81.0×103, 78.9×103 hm2, respectively. The most sensitive areas of land desertification were located in Dawukou, Pingluo, Helan, Yinchuan, northern Lingwu, Zhongning and Shapotou district, which distributed in western Sohyet 240 mm where future ecological environment monitoring, evaluation and management should be enhanced.