基于探地雷达技术的乌鲁木齐河流域土壤水分时空分布研究

项目名称： 基于探地雷达技术的乌鲁木齐河流域土壤水分时空分布研究

项目编号： No.41271437

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 天文学、地球科学

项目作者： 孙莉

作者单位： 中国科学院新疆生态与地理研究所

项目金额： 75万元

中文摘要： 本研究选取乌鲁木齐流域为实验观测场，针对干旱区几种典型景观和特征土壤类型，利用探地雷达（GPR）快速连续地监测土壤含水量及其分布状况，并利用时域反射仪(TDR)和重力取样法进行同步样点测量,来校验探地雷达测量方法的有效性和精确性；采用控制模拟实验和野外实地测量相结合方法，引入相应参数对现有探地雷达测量土壤介电常数模型进行改进，并建立具有干旱区特征的土壤介电常数与含水量的关系模型，提高测量精度，增强模型适用性，从而建立适用于干旱区的探地雷达测量土壤水分的技术体系，为突破大范围动态土壤水分综合监测提供新的技术与方法；通过野外测量获取流域土壤水分的实测数据，研究流域不同景观区的土壤含水量时空分布变化规律，从不同尺度分析干旱区流域影响土壤水分时空分布的环境因素和驱动过程；建立乌鲁木齐河流域的各典型景观区土壤含水量的信息管理系统，为流域水资源管理、荒漠植被保护、精准农业和节水灌溉提供可靠的科学依。

中文关键词： 探地雷达；土壤水分；干旱区内陆河流域；尺度分析；

英文摘要： By selecting the Urumqi Region for experimental observations, the study will consider the typical arid landscapes and soil characteristics of different types, and use ground-penetrating radar (GPR) to monitor soil water content and its distribution rapidly and successively, also the time domain reflectometry (TDR) and gravimetric sampling method will be used synchronously measure to validate the accuracy of GPR method; introduce some corresponding parameters into the existing GPR soil dielectric permittivity models and establish a arid-characteristic model relating to soil dielectric permittivity and water content by combing control simulations and field measurements, aiming at improving the models' accuracy and applicability and forming a technical system of GPR measuring soil moisture in arid areas for breakthroughing new techniques and methods for integrated monitoring of soil moisture dynamically in large scale; obtain a number of measured soil moisture data of the region from field, study the spatial-temporal distribution of the variation of soil moisture in different sites, and analyze the environmental factors and process which affect the distribution of soil moisture at different scales in arid area; establish the Urumqi regional information management system on soil water content in different sites, to

英文关键词： Ground-penetrating Radar；Soil Moisture；Arid Inland River Basin；Scaling；