地球信息科学学报 ›› 2018, Vol. 20 ›› Issue (5): 674-683.doi: 10.12082/dqxxkx.2018.170535
收稿日期:
2017-11-14
修回日期:
2018-03-12
出版日期:
2018-05-29
发布日期:
2018-05-20
通讯作者:
周伟
E-mail:1005940340@qq.com;chouvw@163.com
作者简介:
作者简介:杨根云(1993-),男,硕士生,主要从事岩土体稳定性及工程环境效应方面的研究。E-mail:
基金资助:
YANG Genyun(), ZHOU Wei*(
), FANG Jiaoyong
Received:
2017-11-14
Revised:
2018-03-12
Online:
2018-05-29
Published:
2018-05-20
Contact:
ZHOU Wei
E-mail:1005940340@qq.com;chouvw@163.com
Supported by:
摘要:
本文以北川曲山-擂鼓片区为研究区,将坡度、坡向、高程、地层、距断层的距离、距水系的距离和距道路的距离作为该区域滑坡易发性评价因子。采用信息量模型计算了各项评价因子的信息量值,并运用4种标准化模型对信息量值进行标准化处理。各评价因子的权重由层次分析法(AHP)确定。在GIS中将权重值和各评价因子的标准化信息量值,进行叠加计算得到区域滑坡总信息量值,并基于自然断点法对其进行重分类,将研究区划分为极高易发区、高易发区、中易发区、低易发区和极低易发区5级易发区。将基于4种标准化模型和信息量模型得到的滑坡易发性评价结果进行了对比分析,结果表明:基于最值标准化信息量模型的滑坡易发性评价结果的ROC曲线下面积AUC值为0.807,高于其余模型的AUC值,说明最值标准化信息量模型的滑坡易发性评价效果最好。极高易发区面积占研究区面积的20.03%,离断层和水系较近,主要分布地层为寒武系、志留系和三迭系。研究结果可为区内滑坡风险评价和灾害防治提供参考。
杨根云, 周伟, 方教勇. 基于信息量模型和数据标准化的滑坡易发性评价[J]. 地球信息科学学报, 2018, 20(5): 674-683.DOI:10.12082/dqxxkx.2018.170535
YANG Genyun,ZHOU Wei,FANG Jiaoyong. Assessment of landslide Susceptibility Based on Information Quantity Model and Data Normalization[J]. Journal of Geo-information Science, 2018, 20(5): 674-683.DOI:10.12082/dqxxkx.2018.170535
表1
各评价因子的信息量值及其标准化"
影响因子 | 分类 | 信息量值 | 数据标准化 | |||
---|---|---|---|---|---|---|
最值标准化 | 偏差法标准化 | 对数Logistic标准化 | 反正切函数标准化 | |||
坡度/° | <15 | -7.7457 | 0.0000 | -1.2306 | 0.0004 | -0.9183 |
15~30 | -5.2942 | 0.2047 | -0.7329 | 0.0050 | -0.8812 | |
30~45 | -1.4247 | 0.5278 | 0.0526 | 0.1939 | -0.6104 | |
45~60 | 1.8157 | 0.7984 | 0.7104 | 0.8600 | 0.6795 | |
>60 | 4.2304 | 1.0000 | 1.2007 | 0.9857 | 0.8522 | |
坡向 | 北 | 0.9117 | 1.0000 | 1.2701 | 0.7133 | 0.4706 |
东北 | -2.0117 | 0.0000 | -1.9781 | 0.1180 | -0.7063 | |
东 | -0.9869 | 0.3505 | -0.8395 | 0.2715 | -0.4958 | |
东南 | -0.2583 | 0.5998 | -0.0298 | 0.4358 | -0.1609 | |
南 | 0.0726 | 0.7130 | 0.3378 | 0.5181 | 0.0462 | |
西南 | 0.2955 | 0.7892 | 0.5855 | 0.5734 | 0.1829 | |
西 | -0.1371 | 0.6412 | 0.1048 | 0.4658 | -0.0867 | |
西北 | 0.2628 | 0.7780 | 0.5491 | 0.5653 | 0.1636 | |
距断层的距离/m | 1000 | -0.0228 | 0.8291 | 0.4150 | 0.4943 | -0.0145 |
2000 | 0.3843 | 1.0000 | 0.8986 | 0.5949 | 0.2336 | |
3000 | -0.0229 | 0.8291 | 0.4149 | 0.4943 | -0.0146 | |
4000 | -0.1027 | 0.7956 | 0.3202 | 0.4744 | -0.0651 | |
5000 | -0.4713 | 0.6409 | -0.1176 | 0.3843 | -0.2804 | |
6000 | -1.9983 | 0.0000 | -1.9311 | 0.1194 | -0.7046 | |
距水系的距离/m | 200 | 0.7238 | 1.0000 | 1.5157 | 0.6735 | 0.3989 |
400 | -0.8372 | 0.5019 | 0.2383 | 0.3021 | -0.4437 | |
600 | -1.0897 | 0.4213 | 0.0316 | 0.2517 | -0.5273 | |
800 | -2.0283 | 0.1219 | -0.7365 | 0.1163 | -0.7084 | |
1000 | -2.4102 | 0.0000 | -1.0490 | 0.0824 | -0.7496 | |
地层 | 寒武系 | 0.4548 | 0.8003 | 0.7869 | 0.6118 | 0.2717 |
奥陶系 | 0.0000 | 0.6341 | 0.2295 | 0.5000 | 0.0000 | |
志留系 | -0.6447 | 0.3986 | -0.5606 | 0.3442 | -0.3646 | |
泥盆系 | -0.5498 | 0.4333 | -0.4443 | 0.3659 | -0.3200 | |
石炭系 | -1.7359 | 0.0000 | -1.8978 | 0.1498 | -0.6673 | |
二迭系 | -0.0241 | 0.6253 | 0.2000 | 0.4940 | -0.0153 | |
三迭系 | 1.0015 | 1.0000 | 1.4569 | 0.7314 | 0.5005 | |
第四系 | 0.0000 | 0.6341 | 0.2295 | 0.5000 | 0.0000 | |
高程/m | 600~900 | -1.1545 | 0.0000 | -1.9886 | 0.2397 | -0.5456 |
900~1200 | -0.0043 | 0.7400 | -0.0058 | 0.4989 | -0.0027 | |
1200~1500 | 0.2649 | 0.9131 | 0.4582 | 0.5658 | 0.1649 | |
1500~1800 | 0.2484 | 0.9025 | 0.4298 | 0.5618 | 0.1550 | |
1800~2100 | 0.2403 | 0.8973 | 0.4159 | 0.5598 | 0.1502 | |
2100~2340 | 0.3999 | 1.0000 | 0.6909 | 0.5987 | 0.2422 | |
距道路的距离/m | 200 | 0.1403 | 1.0000 | 1.4541 | 0.5350 | 0.0887 |
400 | -0.0376 | 0.4787 | -0.0310 | 0.4906 | -0.0239 | |
600 | -0.1131 | 0.2576 | -0.6610 | 0.4718 | -0.0717 | |
800 | 0.0509 | 0.7381 | 0.7079 | 0.5127 | 0.0324 | |
1000 | -0.2010 | 0.0000 | -1.3947 | 0.4499 | -0.1263 | |
>1000 | -0.0427 | 0.4639 | -0.0732 | 0.4893 | -0.0271 |
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