Journal of Desert Research ›› 2021, Vol. 41 ›› Issue (2): 181-190.DOI: 10.7522/j.issn.1000-694X.2020.00127
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Haowei Jia1,2(), Changzhen Yan1,3(
), Xuegang Xing1,2, Jiali Xie1, Kun Feng1,2
Received:
2020-08-08
Revised:
2020-12-21
Online:
2021-03-20
Published:
2021-03-26
Contact:
Changzhen Yan
CLC Number:
Haowei Jia, Changzhen Yan, Xuegang Xing, Jiali Xie, Kun Feng. Evaluation of ecological environment in the Dulan County based on the Modified Remote Sensing Ecological Index Model[J]. Journal of Desert Research, 2021, 41(2): 181-190.
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URL: http://www.desert.ac.cn/EN/10.7522/j.issn.1000-694X.2020.00127
年份 | 指标 | PC1 | PC2 | PC3 | PC4 |
---|---|---|---|---|---|
1995年 | WET | 0.464 | 0.487 | -0.656 | 0.342 |
NDVI | 0.583 | -0.165 | 0.576 | 0.548 | |
NDSI | -0.475 | -0.447 | -0.306 | 0.693 | |
TSL | -0.468 | 0.732 | 0.379 | 0.319 | |
特征值 | 0.134 | 0.057 | 0.044 | 0.010 | |
特征值贡献率/% | 54.617 | 23.118 | 18.026 | 4.239 | |
2005年 | WET | 0.526 | 0.601 | -0.588 | 0.131 |
NDVI | 0.379 | 0.164 | 0.649 | 0.639 | |
NDSI | -0.280 | -0.380 | -0.473 | 0.744 | |
TSL | -0.708 | 0.684 | 0.098 | 0.145 | |
特征值 | 0.106 | 0.036 | 0.026 | 0.003 | |
特征值贡献率/% | 62.072 | 21.064 | 15.378 | 1.485 | |
2015年 | WET | 0.514 | 0.551 | 0.633 | 0.178 |
NDVI | 0.544 | -0.054 | -0.568 | 0.616 | |
NDSI | -0.498 | -0.201 | 0.367 | 0.760 | |
TSL | -0.438 | 0.808 | -0.379 | 0.109 | |
特征值 | 0.160 | 0.045 | 0.031 | 0.008 | |
特征值贡献率/% | 65.368 | 18.491 | 12.827 | 3.314 |
Table 1 Indexes of principal component analysis
年份 | 指标 | PC1 | PC2 | PC3 | PC4 |
---|---|---|---|---|---|
1995年 | WET | 0.464 | 0.487 | -0.656 | 0.342 |
NDVI | 0.583 | -0.165 | 0.576 | 0.548 | |
NDSI | -0.475 | -0.447 | -0.306 | 0.693 | |
TSL | -0.468 | 0.732 | 0.379 | 0.319 | |
特征值 | 0.134 | 0.057 | 0.044 | 0.010 | |
特征值贡献率/% | 54.617 | 23.118 | 18.026 | 4.239 | |
2005年 | WET | 0.526 | 0.601 | -0.588 | 0.131 |
NDVI | 0.379 | 0.164 | 0.649 | 0.639 | |
NDSI | -0.280 | -0.380 | -0.473 | 0.744 | |
TSL | -0.708 | 0.684 | 0.098 | 0.145 | |
特征值 | 0.106 | 0.036 | 0.026 | 0.003 | |
特征值贡献率/% | 62.072 | 21.064 | 15.378 | 1.485 | |
2015年 | WET | 0.514 | 0.551 | 0.633 | 0.178 |
NDVI | 0.544 | -0.054 | -0.568 | 0.616 | |
NDSI | -0.498 | -0.201 | 0.367 | 0.760 | |
TSL | -0.438 | 0.808 | -0.379 | 0.109 | |
特征值 | 0.160 | 0.045 | 0.031 | 0.008 | |
特征值贡献率/% | 65.368 | 18.491 | 12.827 | 3.314 |
年份 | 指标 | WET | NDVI | NDSI | LST | MRSEI |
---|---|---|---|---|---|---|
1995 | WET | 1.000 | 0.267 | -0.543 | -0.288 | 0.667 |
NDVI | 0.267 | 1.000 | -0.641 | -0.484 | 0.840 | |
NDSI | -0.543 | -0.641 | 1.000 | 0.147 | -0.906 | |
LST | -0.288 | -0.484 | 0.147 | 1.000 | -0.401 | |
平均相关度 | 0.366 | 0.464 | 0.444 | 0.306 | 0.703 | |
2005 | WET | 1.000 | 0.390 | -0.500 | -0.437 | 0.784 |
NDVI | 0.390 | 1.000 | -0.841 | -0.507 | 0.821 | |
NDSI | -0.500 | -0.841 | 1.000 | 0.283 | -0.772 | |
LST | -0.437 | -0.507 | 0.283 | 1.000 | -0.751 | |
平均相关度 | 0.442 | 0.579 | 0.541 | 0.409 | 0.782 | |
2015 | WET | 1.000 | 0.510 | -0.640 | -0.350 | 0.876 |
NDVI | 0.510 | 1.000 | -0.825 | -0.524 | 0.826 | |
NDSI | 0.640 | -0.825 | 1.000 | 0.421 | -0.875 | |
LST | 0.350 | -0.524 | 0.421 | 1.000 | -0.606 | |
平均相关度 | 0.500 | 0.620 | 0.629 | 0.432 | 0.796 | |
3年内平均 相关度 | WET=0.436,NDVI=0.554,NDSI=0.538, LST=0.383,MRSEI=0.760 |
Table 2 Correlation matrix of MRSEI and four factors
年份 | 指标 | WET | NDVI | NDSI | LST | MRSEI |
---|---|---|---|---|---|---|
1995 | WET | 1.000 | 0.267 | -0.543 | -0.288 | 0.667 |
NDVI | 0.267 | 1.000 | -0.641 | -0.484 | 0.840 | |
NDSI | -0.543 | -0.641 | 1.000 | 0.147 | -0.906 | |
LST | -0.288 | -0.484 | 0.147 | 1.000 | -0.401 | |
平均相关度 | 0.366 | 0.464 | 0.444 | 0.306 | 0.703 | |
2005 | WET | 1.000 | 0.390 | -0.500 | -0.437 | 0.784 |
NDVI | 0.390 | 1.000 | -0.841 | -0.507 | 0.821 | |
NDSI | -0.500 | -0.841 | 1.000 | 0.283 | -0.772 | |
LST | -0.437 | -0.507 | 0.283 | 1.000 | -0.751 | |
平均相关度 | 0.442 | 0.579 | 0.541 | 0.409 | 0.782 | |
2015 | WET | 1.000 | 0.510 | -0.640 | -0.350 | 0.876 |
NDVI | 0.510 | 1.000 | -0.825 | -0.524 | 0.826 | |
NDSI | 0.640 | -0.825 | 1.000 | 0.421 | -0.875 | |
LST | 0.350 | -0.524 | 0.421 | 1.000 | -0.606 | |
平均相关度 | 0.500 | 0.620 | 0.629 | 0.432 | 0.796 | |
3年内平均 相关度 | WET=0.436,NDVI=0.554,NDSI=0.538, LST=0.383,MRSEI=0.760 |
年份 | 参量 | WET | NDVI | NDSI | LST | MRSEI |
---|---|---|---|---|---|---|
1995 | 均值 | -0.221 | 0.134 | 0.060 | 34.041 | 0.300 |
标准差 | 0.074 | 0.130 | 0.065 | 7.335 | 0.225 | |
2005 | 均值 | -0.241 | 0.158 | 0.069 | 35.396 | 0.324 |
标准差 | 0.066 | 0.195 | 0.095 | 7.510 | 0.227 | |
2015 | 均值 | -0.238 | 0.213 | 0.076 | 36.578 | 0.381 |
标准差 | 0.064 | 0.137 | 0.068 | 7.261 | 0.250 |
Table 3 Statistics of four indexes and MRSEI from 1995 to 2015
年份 | 参量 | WET | NDVI | NDSI | LST | MRSEI |
---|---|---|---|---|---|---|
1995 | 均值 | -0.221 | 0.134 | 0.060 | 34.041 | 0.300 |
标准差 | 0.074 | 0.130 | 0.065 | 7.335 | 0.225 | |
2005 | 均值 | -0.241 | 0.158 | 0.069 | 35.396 | 0.324 |
标准差 | 0.066 | 0.195 | 0.095 | 7.510 | 0.227 | |
2015 | 均值 | -0.238 | 0.213 | 0.076 | 36.578 | 0.381 |
标准差 | 0.064 | 0.137 | 0.068 | 7.261 | 0.250 |
级别 | 1995年 | 2005年 | 2015年 | |||
---|---|---|---|---|---|---|
面积/km2 | 占比/% | 面积/km2 | 占比/% | 面积/km2 | 占比/% | |
差 | 18 587.700 | 41.32 | 15 044.80 | 33.49 | 12 084.600 | 26.90 |
较差 | 15 211.600 | 33.81 | 16 632.50 | 37.02 | 13 924.500 | 30.99 |
中 | 6 169.120 | 13.71 | 7 450.49 | 16.58 | 10 413.400 | 23.18 |
良 | 2 726.350 | 6.06 | 3 610.51 | 8.04 | 5 044.290 | 11.23 |
优 | 2 291.110 | 5.09 | 2 188.24 | 4.87 | 3 458.560 | 7.70 |
总计 | 44 985.880 | 100.00 | 44 926.54 | 100.00 | 44 925.350 | 100.00 |
Table 4 Area and proportion of different grades in Dulan County from 1995 to 2015
级别 | 1995年 | 2005年 | 2015年 | |||
---|---|---|---|---|---|---|
面积/km2 | 占比/% | 面积/km2 | 占比/% | 面积/km2 | 占比/% | |
差 | 18 587.700 | 41.32 | 15 044.80 | 33.49 | 12 084.600 | 26.90 |
较差 | 15 211.600 | 33.81 | 16 632.50 | 37.02 | 13 924.500 | 30.99 |
中 | 6 169.120 | 13.71 | 7 450.49 | 16.58 | 10 413.400 | 23.18 |
良 | 2 726.350 | 6.06 | 3 610.51 | 8.04 | 5 044.290 | 11.23 |
优 | 2 291.110 | 5.09 | 2 188.24 | 4.87 | 3 458.560 | 7.70 |
总计 | 44 985.880 | 100.00 | 44 926.54 | 100.00 | 44 925.350 | 100.00 |
类别 | 级差 | 级面积/km2 | 类面积/km2 | 占比/% |
---|---|---|---|---|
等级降低 | -4 | 6.01 | 4 087.86 | 9.14 |
-3 | 46.19 | |||
-2 | 410.29 | |||
-1 | 3 625.37 | |||
等级不变 | 0 | 21 955.60 | 21 955.60 | 49.10 |
等级增加 | 1 | 14 484.50 | 18 675.53 | 41.76 |
2 | 3 722.52 | |||
3 | 443.30 | |||
4 | 25.21 |
Table 5 Changes of MRSEI ecological level in Dulan County from 1995 to 2015
类别 | 级差 | 级面积/km2 | 类面积/km2 | 占比/% |
---|---|---|---|---|
等级降低 | -4 | 6.01 | 4 087.86 | 9.14 |
-3 | 46.19 | |||
-2 | 410.29 | |||
-1 | 3 625.37 | |||
等级不变 | 0 | 21 955.60 | 21 955.60 | 49.10 |
等级增加 | 1 | 14 484.50 | 18 675.53 | 41.76 |
2 | 3 722.52 | |||
3 | 443.30 | |||
4 | 25.21 |
时期 | 参量 | 森林 | 草地 | 农田 | 湿地 | 建设用地 | 荒漠 |
---|---|---|---|---|---|---|---|
1995年 | 面积/km2 | 726.91 | 20 148.73 | 339.45 | 358.09 | 85.50 | 23 538.71 |
比例/% | 1.61 | 44.58 | 0.75 | 0.79 | 0.19 | 52.08 | |
2005年 | 面积/km2 | 727.34 | 20 158.48 | 342.37 | 373.94 | 211.33 | 23 383.93 |
比例/% | 1.61 | 44.60 | 0.76 | 0.83 | 0.47 | 51.74 | |
2015年 | 面积/km2 | 734.43 | 20 130.09 | 403.10 | 302.56 | 385.88 | 23 241.34 |
比例/% | 1.62 | 44.54 | 0.89 | 0.67 | 0.85 | 51.42 | |
1995—2005年 | 面积变化/km2 | 0.43 | 9.75 | 2.92 | 15.85 | 125.83 | -154.78 |
2005—2015年 | 面积变化/km2 | 7.09 | -28.39 | 60.73 | -71.38 | 174.55 | -142.59 |
1995—2015年 | 面积变化/km2 | 7.52 | -18.64 | 63.65 | -55.53 | 300.38 | -297.37 |
Table 6 The land use area change of Dulan County from 1995 to 2015
时期 | 参量 | 森林 | 草地 | 农田 | 湿地 | 建设用地 | 荒漠 |
---|---|---|---|---|---|---|---|
1995年 | 面积/km2 | 726.91 | 20 148.73 | 339.45 | 358.09 | 85.50 | 23 538.71 |
比例/% | 1.61 | 44.58 | 0.75 | 0.79 | 0.19 | 52.08 | |
2005年 | 面积/km2 | 727.34 | 20 158.48 | 342.37 | 373.94 | 211.33 | 23 383.93 |
比例/% | 1.61 | 44.60 | 0.76 | 0.83 | 0.47 | 51.74 | |
2015年 | 面积/km2 | 734.43 | 20 130.09 | 403.10 | 302.56 | 385.88 | 23 241.34 |
比例/% | 1.62 | 44.54 | 0.89 | 0.67 | 0.85 | 51.42 | |
1995—2005年 | 面积变化/km2 | 0.43 | 9.75 | 2.92 | 15.85 | 125.83 | -154.78 |
2005—2015年 | 面积变化/km2 | 7.09 | -28.39 | 60.73 | -71.38 | 174.55 | -142.59 |
1995—2015年 | 面积变化/km2 | 7.52 | -18.64 | 63.65 | -55.53 | 300.38 | -297.37 |
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