| 干旱半干旱地区降雨对遥感地质信息提取影响研究 |
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| 引用本文： | 栾卓然,吕凤军,赵志远,王梦然.干旱半干旱地区降雨对遥感地质信息提取影响研究[J].地质找矿论丛,2021,36(3):342-354. |
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| 作者姓名： | 栾卓然 吕凤军 赵志远 王梦然 |
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| 作者单位： | 河北地质大学河北省战略性关键矿产资源重点实验室, 石家庄 050031;河北地质大学地球科学学院, 石家庄 050031;河北水文工程地质勘察院, 石家庄 050021;河北省水文工程地质勘查院, 石家庄 050021 |
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| 基金项目： | 河北省高等学校科学技术研究项目（编号：QN2018131）、河北地质大学博士科研启动基金项目（编号：BQ2018014）、河北省教育厅科学技术研究项目（编号：ZD2021017）联合资助。 |
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| 摘 要： | 以河北省围场地区的SPOT-6和OLI、ETM+作为数据源,依据该区80余天的气象条件,分别利用降雨前3景、降雨后3景遥感数据提取了蚀变遥感信息、岩石类型、环形构造、线性构造等遥感地质信息,并实测雨前雨后不同岩石类型的波谱。认为降雨后获取的遥感数据源能够有效反映研究区遥感地质信息。工作区线性纹理发育,降水能提高地物含水量,影像对比度提高,使得线性构造、环形构造及绿泥石化蚀变带在雨后遥感影像中识别程度较其在雨前遥感影像中识别程度有所提高。野外检查发现,利用雨后遥感数据提取的铁染蚀变遥感信息优于利用雨前遥感数据所提取的铁染蚀变信息,并且利用雨后遥感数据提取铁染蚀变遥感异常的损失率远低于利用雨前遥感数据提取的铁染蚀变遥感异常的损失率,而利用雨前、雨后遥感数据所提取羟基蚀变遥感异常信息基本一致。
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| 关 键 词： | 遥感 地质信息 半干旱地区 蚀变遥感信息 波谱特征 河北省 |
| 收稿时间： | 2021/1/29 0:00:00 |
| 修稿时间： | 2021/6/22 0:00:00 |
Influence of rainfall on remote sensing geological information extraction in arid and semi-arid area |
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| LUAN Zhuoran,LV Fengjun,ZHAO Zhiyuan,WANG Mengran.Influence of rainfall on remote sensing geological information extraction in arid and semi-arid area[J].Contributions to Geology and Mineral Resources Research,2021,36(3):342-354. |
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| Authors: | LUAN Zhuoran LV Fengjun ZHAO Zhiyuan WANG Mengran |
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| Institution: | Hebei key lab of strategic critical mineral resources, Hebei geouniversity, Shijiazhuang 050031, China;College of earth sciences, Hebei geouniversity, Shijiazhuang 050031, China;Hebei company of hydrogeological engineering geology, Shijiazhuang 050021, China; Hebei institute of hydrogeological engineering geology, Shijiazhuang 050021, China |
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| Abstract: | According to 80 days'' climatic situation of Weichang area in Hebei province data of Spot-6 and OLI, ETM+ from 3 scences before and after rainfall are collected to extract geological information of alteration, rock types, ring structure and linear structure and spectrum of rocks are measured before and after rainfall respectively. Data after rainfall can effectively reflect the remote sensing geological information. In the 3 scenes are developed linear structure. Rainfall bring water content higher in the linear and ring structure and chloritization zones than in their surroundings thus they become contrasty and more recognizable on satellite images than on those before rainfall. Field check shows that iron stain information extraction from the after rainfall images is generally better than that from the before rainfall. The extraction of Hydroxyl anomaly is basically the same. |
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| Keywords: | remote sensing geological information semi-arid area remote sensing alteration information spectral characteriscs Weichang area in Hebei province |
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