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延安市宝塔区治沟造地工程的分布规律
王晓晨, 许强, 赵宽耀, 叶震, 郭鹏, 郭晨
地质灾害防治与地质环境保护国家重点实验室(成都理工大学), 四川 成都 610059
摘要:
[目的]研究延安市宝塔区治沟造地工程的分布规律以及影响因素,为之后的治沟工程提供科学方法和治理思路。[方法]基于高精度遥感影像和无人机航拍影像的目视解译,采用数理统计法和量化分析法,通过不同指标研究治沟造地工程的分布规律及影响因素。[结果]①在研究区内统计的31个流域中,17个流域治沟率在30%以上,随着流域平均高程增加各单流域治沟率呈线性增加;②统计单个流域内治理工程244个高程标记点的高程率,186个高程率大于0.38;③统计32个居民点的高程率,23个高程率低于0.4。[结论]治沟造地工程在整个研究区流域内的上游分布较多,下游分布较少;单个流域中治理工程多位于各个流域的中上游;坡度对治沟造地工程有影响,治理工程多分布于坡度本身缓和的支沟中;研究区内居民点的高程率较低,多分布于流域的下游,治沟造地工程对居民的生活区域没有大规模影响。
关键词:  治沟造地  基本规律  影响因素  治沟率  高程率  坡度
DOI:10.13961/j.cnki.stbctb.2019.02.023
分类号:P642.13+1
基金项目:国家自然科学基金重大项目“面向人地协调的黄土重大工程灾变防控研究”(41790445);国家自然科学基金重点项目“溃散性滑坡成因机理、监测预警与定量风险评价”(41630640)
Distribution Rule of Govening Valleys Project in Baota District of Yan'an City
Wang Xiaochen, Xu Qiang, Zhao Kuanyao, Ye Zhen, Guo Peng, Guo Chen
State Key Laboratory of Geohazard Prevention and Geoenvironment Protection(Chengdu University of Technology), Chengdu, Sichuan 610059, Chian
Abstract:
[Objective] This paper studied the distribution rule and influencing factors of the governing valleys project in the Baota District of Yan'an City in order to provide scientific methods and management ideas for the later governing valleys project.[Methods] Based on the high-precision remote sensing image and the aerial interpretation of the aerial image of the drone, the mathematical statistics method and the quantitative analysis method were used to study the distribution rule and influencing factors of the governing valleys project through different indicators.[Results] ① In the 31 basins counted in the study area, the gully rate of 17 river basins was 30% or more, and the gully rate of each single basin increased linearly with the increase of the average elevation of the basin; ② The elevation rate of 244 elevation points in the governance project in a single watershed was counted, and 186 elevation ratios were greater than 0.38; ③ The elevation rate of 32 settlements was counted, and the 23 elevation rates were below 0.4.[Conclusion] The trench governing valleys project is distributed more upstream in the basin of the study area, and the downstream distribution is less; the governance projects in a single basin are mostly located in the middle and upper reaches of each basin; the slope has an impact on the governing valleys project, and the governance projects are mostly distributed in the branch ditch where the slope itself is moderated. The elevation rate of the residential area in the study area is relatively low, and it is mostly distributed in the downstream of the river basin. The governing valleys project has no large-scale impact on the living area of the residents.
Key words:  governing valleys  basic rule  influencing factor  governance rate  elevation rate  slope