摘要
为了实现宏观、快速、大范围圈定找水远景区,降低传统找水工作的风险性和盲目性。根据土壤湿度在一定程度上可反映出浅层地下水的富集程度这一特性,将修正归一化水体差异指数MNDWI作为提取浅层地下水的关键因子,利用ETM数据进行了定量反演,并通过最优密度分割的方法,提取那些中间色调作为找水信息,圈定了找水远景区。通过实地考察,勘察精度可达到85.76%,结果令人满意,说明该方法具有一定的可靠性和实用性。
In order to delineate prospective region ofshallow groundwater macroscopically, quickly and widely, anddecrease risks and blindness of conventional ground investigation, based on the feature that soil humidity can indicate the existence of shallow groundwater, this paper selected normalized difference water index as a key factor and inversed MNDWI by ETM data. According to the method of optimum density slice, the medium tone was extracted as shallow groundwater information, and the prospective region of groundwater was also delineated. Based on to investigation, the accuracy of survey is 85.76%, the result is satisfactory and shows the method has some reliability and practicability.
出处
《长春理工大学学报（自然科学版）》
2009年第1期91-95,共5页
Journal of Changchun University of Science and Technology(Natural Science Edition)
关键词
土壤湿度指数
ETM数据
浅层地下水
normalized difference water index
ETM data
shallow groundwater
