Diao River in Guangxi remote sensing survey of geo

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Diao River in Guangxi remote sensing survey of geological environment

Abstract In this paper, 1998, ETM, TM satellite data, images, Diao River in Guangxi to carry out environmental and geological remote sensing survey ①, according to environmental geology of the image feature information, outlined the status of the field distribution, that they harm, prevention of geological environment put forward countermeasures and suggestions. Environmental geology and environmental geology field investigations provide a credible basis for comprehensive improvement. 0, Introduction to complement the difficult to meet the job requirements. Diao River in Guangxi decided to carry out environmental and geological remote sensing survey, the working scale of 1:10 million, using 1998 ETM, TM satellite data and images as an adjunct to survey, remote sensing, environmental and geological interpretation of focus of the investigation are: soil erosion, Desertification (karst), waterlogging and drought, the distribution of mine environmental geology status quo. Identified by remote sensing survey Hechi City of Guangxi, Yizhou, Duan, Nandan County, the environmental geology of the Diao River (the upper) and distribution of the harm watershed location for the Geological comprehensive treatment demonstration project 1, environmental geology of the image feature 1.1 image features of soil erosion in the TM, ETM image map, pale red, purple, green and a small amount of local folder emerald green, the color is relatively uniform, Distribution of unique and focused, eye-catching; pattern was plaque and particles in order to board root-like, narrow and irregular-shaped main strip; water less developed, and many more sparse mainly single Gully; distributed in the peak cluster , peaks depression and sulfate rocks and debris rocky body exchange or top of the site. Vegetation coverage is poor, bare was ± 80%. 1.2 Desertification (karst) features the image the TM, ETM true color images and computer simulation image processing, and desertification with rich colors, shapes, shadow patterns, topography and other image features clearly. Simulated true color image: red desertification gray, dark gray color. Irregular distribution of rod-like shape, branching rods, block-shaped, with peanut shells or spot film grain patterns to peaks, peak cluster, the main peak and depression, and the landscape is closer to the ground. Computer image processing: was dark red, crimson, red color, irregular distribution of the short rod, Oujie like, root-like, banded, with orange peel pattern, a short ridge, ridge ridge, the point schlieren tablets. To peak cluster peaks, mainly depression, images of vegetation (green) and desertification (dark red, crimson) was exposed to the phenomenon of contrast, more intuitive. 1.3 waterlogging in the image features TM, ETM image map, pale red, purple, with green color; were shadow plaques, and granular pattern; water less developed, mainly to single Gully; shape of a narrow banded and irregular-shaped main; landscapes mostly peak cluster,[link widoczny dla zalogowanych], peaks and depressions. The interpretation of its eye-catching signs are: more than a karst depression peaks around the bushes and rocks Gao Taishan body around, and depression, only a narrow outlet, the image reflected in puddles clear poly (basin) land. 1.4 image features drought and water shortage in the TM, ETM image map, pale red, purple red, with green, emerald green; color distribution is relatively uniform, was spotted, patchy shadow pattern; water are not developed, local section shows a single Gully; irregular shape of the narrow ribbon; landscape in much the peak cluster, peaks low and the depression. The interpretation of its eye-catching signs are: low and depressions in the surrounding more than a rocky Karst and debris around the body of intermittent, local section only some 1.5 mine environmental geology of the image feature in the TM, ETM image map, showing purple, purple , not very uniform color distribution, the patchy pattern-based video; water system is relatively developed, such as: mining in the region visible karst river, branch water; followed by irregular blocks, long strips. Body on the rocky landscape dominated by debris, karst landform found only in local areas, the interpretation of its eye-catching logo is: was purple, the color purple patch that: 2, the remote sensing survey in environmental geology environmental geology under TM, ETM image characteristics of human-computer data interactive interpretation, environmental geology and distribution of remote sensing survey in the following situation. 2.1 Current distribution of soil erosion for the Diao River 13 lots over the situation of soil erosion, the environmental and geological remote sensing interpretation, the use of Mapgis software has been an area of statistics, the results in Table 1. Diao River in the area of soil erosion Tables Table 1 No. Distribution of the lot area (km2) Number distribution of site area (km2) 1 pull Duan Ren Hechi Jiuweigang 10.312 7.888 Duan Lalie 36.199 9.833 Hechi City, Duan board exam Hechi City Bao-ping Ling 13.5510 10.434 6.8211 Hechi Mayor Duan three sheep Duan Piovan old 11.325 11.5712 7.896 Hechi Wang Duan plus three of your 12.5313 ~ Tong Tong Nandan A pipe 34.097 9.20 Total Fair Hechi five 181.61km2 2.2 desertification status criteria for the classification and distribution of carbonate desertification area is due to human effects caused by the destruction of forest vegetation surface, soil erosion, soil layer thinning, so that gradually exposed bedrock, the surface showing the process of desertification landscape, the result is the loss of arable soil and a large area of exposed bedrock. According to desertification attainment exemplar 2 rock desertification degree of rock exposed bare rock without vegetation structure structure of desertification 70 planar Groomers

Diao River karst area of rocks and debris 3601.20km2. A karst area: 3051.20km2; rocky desertification area 637.79km2. Among them, severe desertification area: 196.83km2, moderate rocky desertification area: 149.93km2, slight rocky desertification area: 291.03km2; River Reservoir, Reservoir Area: about 7.0km2; clastic rock area: 550km2. The distribution of desertification and damage range, shown in Table 3. Diao River Basin area of bare stone desert tables Table 3 Distribution of the lot number desertification mild to moderate and severe desertification desertification exposed area (km2) exposed area (km2) exposed area (km2) 1 Nandan County, Hechi City, a five-Wei Ping 27.9630.8943.212 Hechi Baoping 30.5912.9452.724 41.9517.9327.363 Duan Duan three board Ling 13.3415.868.495 Duan Duan 37.8532.0014.716 sheep under the Au 12.369.8054.858 Lalie 13.458.3140.057 leading 25.4022.2049.64 Yizhou Total 196.83149.93291.03 2.3 Current distribution of waterlogging Diao River Basin are County La Lie, Piovan, plus you, pull the case of Ren and other places waterlogging, the interpretation of remote sensing, the use of Mapgis software has been an area of statistics, the results in Table 4. Diao River in the area of waterlogging Tables Table 4 No. Distribution of the lot area (km2) Number distribution of site area (km2) 1 pull-Ren Duan Add your 7.092 10.413 Duan Duan Duan Piovan Lalie 3.204 2.15 Total 22.85km2 2.4 Current distribution of drought and water shortage Diao River in the north Yizhou teeth, leading; Duan La Lie, plate Ridge and other places drought and water shortage situation, the interpretation of remote sensing, the use of Mapgis software has been an area of statistics, the results shown in Table 5. Diao River in the area of drought and water shortage statistics Table 5 No. Distribution of the lot area (km2) Number distribution of site area (km2) 1 Yizhou City North teeth 51.03 (14.04 +36.99) 3 Duan Duan Lalie 40.862 31.824 Yizhou leader board Ling 9.89 Total 133.60km2 2.5 Current distribution of mine environmental geology (1) TM, ETM image feature interpretation of the results: Diao River Basin mines and other places of geological environment conditions, the environmental and geological remote sensing interpretation, the use of Mapgis software has been an area of statistics, the results following table 6. Diao River in the area of mine environmental geology Tables Table 6 No. Distribution of the lot area (km2) Number distribution of site area (km2) 11 号 mine No mining area regional 13.5733 7.0922 5.45 Total No. mining region 35.37km2