• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Land Degradation and Development >Soil salinity development in the yellow river delta in relation toTI Soil salinity development in the yellow river delta in relation to groundwater dynamics
【24h】

Soil salinity development in the yellow river delta in relation toTI Soil salinity development in the yellow river delta in relation to groundwater dynamics

机译：黄河三角洲土壤盐分的发展与TI的关系黄河三角洲土壤盐分的发展与地下水的动力学关系

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The Yellow River Delta occupies an important position in the global ecosystem because of its valuable wetland habitat resources for migratory birds on the Eastern Pacific migration route. However, it has suffered from severe land degradation because of soil salinization. This paper assesses the distribution maps of saline soils during the past two decades, using field observations at three points in time using remote sensing images for the same periods, in combination with spatial models. Soil salinization appears to have expanded from the coastline to inland areas of the Yelow River Delta at a surprising speed during that period. The spatio-temporal dynamics of the groundwater table and total dissolved solids (TDS) during the last 20 years were analyzed using maps based on Kriging interpolation. Kriging helped substantially to improve the accurateness of the predicted values of soil salt content, using a random subsample of the observation points as validation basis. Correlation analysis of the spatial data revealed that the distribution and evolution of saline soils are closely related to the dynamics of groundwater: the aggravation of soil salinization is associated with a rising groundwater table and increasing TDS. Insufficient recharge of the groundwater with fresh surface water due to reduced Yellow River discharge and subsequent seawater intrusion are therefore serious environmental problems in the Yellow River Delta ecosystem
机译：黄河三角洲在全球生态系统中占有重要地位，因为它拥有宝贵的湿地栖息地资源，可用于东太平洋迁徙路线上的候鸟。然而，由于土壤盐碱化，它遭受了严重的土地退化。本文结合空间模型，利用同期三个遥感图像在三个时间点的野外观测，评估了过去二十年中盐渍土壤的分布图。在此期间，土壤盐渍化似乎以惊人的速度从耶洛河三角洲的海岸线扩展到了内陆地区。使用基于克里格插值的地图分析了过去20年中地下水位和总溶解固体（TDS）的时空动态。克里金法使用观测点的随机子样本作为验证基础，大大提高了土壤盐含量预测值的准确性。空间数据的相关性分析表明，盐渍土壤的分布和演化与地下水的动力学密切相关：土壤盐碱化的加剧与地下水位的升高和TDS的升高有关。因此，由于黄河流量的减少和地下水的入侵，导致地下水补给不足，是黄河三角洲生态系统中严重的环境问题。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号