首页关于本刊影响因子及获奖投稿须知订阅及广告专辑与专题学术会议绿色发表通道优秀论文 
葛少青,张剑,孙文,王利平,耿亚军,范双萍.三种干旱指数在干旱区沼泽湿地土壤水分遥感反演中的应用.生态学报,2018,38(7):2299~2307 本文二维码信息
二维码(扫一下试试看!)
三种干旱指数在干旱区沼泽湿地土壤水分遥感反演中的应用
Application of three drought indexes in soil moisture inversion using remote sensing in marsh wetlands of arid area
投稿时间:2017-06-14  修订日期:2017-10-27
DOI: 10.5846/stxb201706141089
关键词干旱指数  干旱区  沼泽湿地  遥感影像  土壤水分  反演
Key Wordsdrought indexes  arid area  marsh wetland  remote sensing image  soil moisture  inversion
基金项目国家自然科学基金项目(41461012);甘肃省自然科学基金项目(1208RJZA114)
作者单位E-mail
葛少青 西北师范大学地理与环境科学学院, 兰州 730070  
张剑 西北师范大学地理与环境科学学院, 兰州 730070 jianzhang@nwnu.edu.cn 
孙文 西北师范大学地理与环境科学学院, 兰州 730070  
王利平 西北师范大学地理与环境科学学院, 兰州 730070  
耿亚军 西北师范大学地理与环境科学学院, 兰州 730070  
范双萍 西北师范大学地理与环境科学学院, 兰州 730070  
摘要点击次数 89
全文下载次数 63
摘要:
湿地水文条件对湿地生态系统结构和功能起着关键作用。借助卫星遥感技术,以干旱区疏勒河中下游沼泽湿地为研究对象,基于Landsat8 OLI遥感影像的温度植被干旱指数(TVDI)、垂直干旱指数(PDI)和归一化干旱监测指数(NPDI)3种干旱监测方法,结合野外湿地实测土壤水分数据进行比较和验证。结果表明:(1)TVDI、PDI和NPDI3种干旱指数在不同土层中均与土壤实测水分呈显著负相关(P < 0.01),且NPDI指数与表层土壤水分的拟合效果最好。不同土层中,3种干旱指数与土壤水分的拟合优度大小均为NPDI > TVDI > PDI;(2)研究区同一湿地类型不同土层的土壤水分存在显著差异(P < 0.05),且不同湿地类型的土壤水分总体上表现为随着土壤深度的增加呈递增态势;(3)研究区同一土层不同湿地类型的土壤水分差异显著(P < 0.05),且不同土层中土壤水分的大小均为:沼泽化草甸 > 草本沼泽 > 季节性咸水沼泽 > 内陆盐沼。
Abstract:
Wetland hydrological conditions play a key role in the structure and function of the wetland ecosystem. In this study, we use three drought monitoring methods, Temperature Vegetation Dryness Index (TVDI), Perpendicular Drought Index (PDI), and Normalized PDI (NPDI) as well as soil moisture observation data in the field to study marsh wetlands of an arid area in the middle and lower reaches of the Shule River using a remote sensing technology based on the Landsat8 Operational Land Imager (OLI). We obtained the following results in this study:1) TVDI, PDI, and NPDI were significantly negatively correlated with soil moisture in different soil layers (P < 0.01), the goodness of fit among the three drought indexes was in the following order of magnitude NPDI > TVDI > PDI with soil moisture in different soil layers, and the fitting results using the NPDI index were the best with topsoil moisture; 2) there were numerous significant differences in soil moisture among different soil layers of the same marsh type (P < 0.05), and an increasing trend in the soil moisture of different marsh types was observed with increasing soil depth; 3) the soil moisture was significantly different between different marsh types of the same soil layer (P < 0.05), and the comparison of soil moisture in the different soil layers showed the following decreasing order of magnitude:marsh meadow > herbaceous marsh > seasonal saline marsh > inland salt marsh.
HTML 查看全文   查看/发表评论  下载PDF阅读器

您是本站第 69971876 位访问者

Copyright © 2005-2019   京ICP备06018880号
地址:北京海淀区双清路18号
  邮编:100085    电话:010-62941099
  E-mail : shengtaixuebao@rcees.ac.cn
本系统由北京勤云科技发展有限公司提供技术支持