Remote sensing analysis of temporal and spatial evolution trend of loose material sources in meizoseismal area, Baisha River Basin, Dujiangyan, China
HU Yunhua1, LIU Jingjing2, JIANG Yi2, BAO Yuhai3
1. The Third Surveying and Mapping Engineering Institute of Sichuan Province, 610500, Chengdu, China; 2. Chengdu Water Affairs Technical Center, 610036, Chengdu, China; 3. Key Laboratory of Mountain Surface Processes and Ecological Regulation, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, 610041, Chengdu, China
Abstract：[Background] Baisha River Basin is the main drinking water source in the main urban area of Chengdu. The "5·12" Wenchuan earthquake led to the accumulation of a large number of collapse and landslide debris on the steep slopes, resulting in serious soil and water loss during rainstorm, which has a serious impact on the water supply of the water source. The investigation and change trend analysis of loose material sources in the basin have important guiding significance for the comprehensive control of soil and water loss in the basin.[Methods] Four periods of high-resolution remote sensing images one year before the earthquake and 10 years after the earthquake were selected. The loose material source was extracted by using object-oriented remote sensing automatic interpretation combined with human-computer interaction. The spatial distribution and dynamic change characteristics of material source were analyzed by GIS spatial analysis method.[Results] Before the "5·12" Wenchuan earthquake in 2008, the loose material sources area of the basin was only 20.05 km2, accounting for 5.57% of the total area of the basin. The "5·12" Wenchuan earthquake caused a large number of new loose material sources in the basin, with a total area of 106.31 km2, accounting for 29.52% of the total area of the basin. At 10 years after the earthquake, the total material source area decreased by 66.95 km2. There are still a few new sources in the basin after the earthquake, and the new sources in the 5 years after the earthquake are mainly distributed in the lower reaches of the basin due to human activities such as post disaster recovery and reconstruction, river dredging and mining. At 5-10 years after the earthquake, the newly added sources decreased, which was mainly caused by the expansion of the source range of some slopes in the upper reaches of the basin or the newly added collapse and landslide sources. The earthquake caused the average source center of the basin to move about 6.7 km downstream as a whole, and the average source center gradually moved back at 10 years after the earthquake.[Conclusions] Although the ecological restoration of the basin is obvious, there is still a certain gap from that before the earthquake. The material sources in the three directions of southwest by west, northwest by west and northwest by north of the upstream are still in an unstable state, which is the area to be treated in the next step.
胡云华, 刘晶晶, 江怡, 鲍玉海. 强震区都江堰市白沙河流域松散物源时空演变趋势遥感分析[J]. 中国水土保持科学, 2023, 21(2): 57-63.
HU Yunhua, LIU Jingjing, JIANG Yi, BAO Yuhai. Remote sensing analysis of temporal and spatial evolution trend of loose material sources in meizoseismal area, Baisha River Basin, Dujiangyan, China. SSWC, 2023, 21(2): 57-63.
乔建平, 王萌, 吴彩燕, 等. 汶川地震扰动区小流域滑坡泥石流风险评估:以都江堰白沙河流域为例[J]. 中国地质灾害与防治学报, 2018, 29(4):2. QIAO Jianping, WANG Meng, WU Caiyan, et al. Landslide and debris flow risk assessment for small watersheels in the Wenchuan earthquake disturbance area:Taking the Baishahe River Basin in Dujiangyan as an example[J]. The Chinese Journal of Geological Hazard and Control, 2018, 29(4):2.
[2]
向龙, 陈宁生, 李俊.震后白沙河、龙溪河流域泥石流灾害治理效果分析:以四川都江堰市三合场沟为例[J].人民长江, 2016, 47(23):60. XIANG Long, CHEN Ningsheng, LI Jun. Effect analysis of debris flow control in Baisha River basin and Longxi River basin after earthquake:Case of Sanhechang Gully in Dujiangyan city, Sichuan province[J]. Yangtze River, 2016, 47(23):60.
[3]
王协康, 杨坡, 孙桐, 等.山区小流域暴雨山洪灾害分区预警研究[J].四川大学学报(工程科学版), 2021, 53(1):34. WANG Xiekang, YANG Po, SUN Tong, et al. Study on division early warning of flash flood disaster caused by rainstorm in mountainous small watersheds[J].Advanced Engineering Sciences, 2021, 53(1):34.
[4]
乔建平, 黄栋, 杨宗佶, 等. 汶川地震极震区泥石流物源动储量统计方法讨论[J]. 中国地质灾害与防治学报, 2012, 23(2):1. QIAO Jianping, HUANG Dong, YANG Zongji, et al. Statistical method on dynamic reserve of debris flow's source materials in meizoseismal area of Wenchuan earthquake region[J]. The Chinese Journal of Geological Hazard and Control, 2012, 23(2):1.
[5]
黄润秋, 李为乐."5·12"汶川大地震触发地质灾害的发育分布规律研究[J].岩石力学与工程学报, 2008, 27(12):2585. HUANG Runqiu, LI Weile.Research on development and distribution rules of geohazards induced by Wenchuan earthquake on 12th may, 2008[J]. Chinese Journal of Rock Mechanics and Engineering, 2008, 27(12):2585.
[6]
孙丽文, 史常青, 赵廷宁, 等.汶川地震滑坡治理区植被恢复效果研究[J].中国水土保持科学, 2015, 13(5):86. SUN Liwen, SHI Changqing, ZHAO Tingning, et al. Vegetation recovery in the landslide-tackling area of Wenchuan earthquake[J]. Science of Soil and Water Conservation, 2015, 13(5):86.
[7]
熊江, 唐川, 史青云, 等. 强震区泥石流物源演化特征分析[J]. 山地学报, 2019, 37(5):728. XIONG Jiang, TANG Chuan, SHI Qingyun, et al. Evolution characteristics of debris flow sources in strong earthquake area[J].Mountain Research, 2019, 37(5):728.
[8]
夏冰, 范宣梅, 郭晓军, 等.地震效应下的土壤侵蚀空间分布特征及分析:以九寨沟地震为例[J].中国水土保持科学, 2020, 18(1):79. XIA Bing, FAN Xuanmei, GUO Xiaojun, et al. Spatial distribution characteristics and analysis of soil erosion under earthquake effect:A case study of Jiuzhaigou earthquake. Science of Soil and Water Conservation, 2020, 18(1):79.
[9]
王治华. 滑坡遥感调查、监测与评估[J]. 国土资源遥感, 2007, 19(1):10. WANG Zhihua. Remote sensing for landslide survey, monitoring and evaluation[J]. Remote Sensing for Land & Resources, 2007, 19(1):10.
[10]
许强, 李为乐. 汶川地震诱发大型滑坡分布规律研究[J]. 工程地质学报, 2010, 18(6):818. XU Qiang, LI Weile. Distribution of large-scale landslides induced by the Wenchuan Earthquake[J]. Journal of Engineering Geology, 2010, 18(6):818.
[11]
崔鹏, 韦方强, 何思明, 等. 5·12汶川地震诱发的山地灾害及减灾措施[J]. 山地学报, 2008, 26(3):280. CUI Peng, WEI Fangqiang, HE Siming, et al. Mountain disasters induced by the earthquake of May 12 in Wenchuan and the disasters mitigation[J]. Mountain Research, 2008, 26(3):280.
[12]
崔鹏, 庄建琦, 陈兴长, 等. 汶川地震区震后泥石流活动特征与防治对策[J]. 四川大学学报(工程科学版), 2010, 42(5):10. CUI Peng, ZHUANG Jianqi, CHEN Xingchang, et al. Characteristics and countermeasures of debris flow in Wenchuan Area after the earthquake[J]. Journal of Sichuan University (Engineering Science Edition), 2010, 42(5):10.
[13]
崔鹏, 韩用顺, 陈晓清. 汶川地震堰塞湖分布规律与风险评估[J]. 四川大学学报(工程科学版), 2009, 41(3):35. CUI Peng, HAN Yongshun, CHEN Xiaoqing. Distribution and risk analysis of dammed lakes reduced by Wenchuan Earthquake[J]. Journal of Sichuan University (Engineering Science Edition), 2009, 41(3):35.
[14]
FAN Xuanmei, SCARINGI Gianvito, KORUP Oliver, et al. Earthquake-induced chains of geologic hazards:Patterns, mechanisms, and impacts[J]. Reviews of Geophysics, 2019, 57:421.
[15]
杨雨行. 研究森林变化对河川水沙影响的一种便捷方法:以四川省都江堰市白沙河为例[J]. 北京林业大学学报, 1995, 17(1):97. YANG Yuxing. A forthright way of research on effect of forests change on flow and sediment of river[J]. Journal of Beijing Forestry University, 1995, 17(1):97.
[16]
周家文, 杨兴国, 李洪涛, 等. 汶川大地震都江堰市白沙河堰塞湖工程地质力学分析[J]. 四川大学学报(工程科学版), 2009, 41(3):102. ZHOU Jiawen, YANG Xingguo, LI Hongtao, et al. Engineering geo-mechanics analysis of the barrier lake in Baisha River at Dujiangyan city induced by Wenchuan earthquake[J]. Journal of Sichuan University (Engineering Science Edition), 2009, 41(3):102.
[17]
陈云浩, 冯通, 史培军, 等.基于面向对象和规则的遥感影像分类研究[J]. 武汉大学学报(信息科学版), 2006, 31(4):316. CHEN Yunhao, FENG Tong, SHI Peijun, et al. Classification of remote sensing image based on object oriented and class rules[J]. Geomatics and Information Science of Wuhan University, 2006, 31(4):316.
[18]
罗志东, 刘二佳, 齐实, 等.基于系统工程学的土壤侵蚀高分遥感监测与评价工程化模式[J].中国水土保持科学, 2019, 17(1):124. LUO Zhidong, LIU Erjia, QI Shi, et al. High-resolution remote sensing monitoring and evaluation engineering mode of soil erosion based on system engineering[J]. Science of Soil and Water Conservation, 2019, 17(1):124.
2023, Vol. 21 
