浅谈低山丘陵地区1/5万地质灾害调查工作——以江西省定南县为例

DISCUSSION ON 1/50 000 GEOLOGICAL HAZARDS INVESTIGATION IN LOW MOUNTAIN AND HILL REGION——TAKE DINGNAN COUNTY IN JIANGXI PROVINCE AS AN EXAMPLE

近年来,全国各省市陆续在开展1/5万地质灾害调查工作,不同地貌区地质灾害发育情况不同,调查方法与要求亦有区别。平原岗丘地区往往存在地质灾害点达不到观测点数量要求,需要增加地质环境点来满足精度;而西南高山区灾害点少但规模大,许多灾害点往往要通过大比例尺的测绘才能调查清楚。相比之下,低山丘陵地区地质灾害点具有点多面广的特点,规模多为小型,调查任务艰巨。本文以江西省定南县为例,阐述低山丘陵地区1/5万县(市)地质灾害调查的技术方法与认识,以期对类似地区的调查有所帮助。

In recent years, Chinese provinces are carrying out the 1/50 000 geological hazards investigation. Geological hazard of different geomorphologie is different; so the investigation methods and requirements are also different. The number of geo- logical hazards in the plains can＇t meet the specification requirements. Therefore, it is necessary to increase the number of geo- logical environment to meet the accuracy. While the number of disaster in Southwest＇s mountain region is small, with great scale, and many disasters are often investigated by large-scale mapping. ]n contrast, the geological hazards in low mountain and hill region, have a wide range of features, with small scale, and the investigation task is arduous. Taking the Dingnan County of Jiangxi Province as an example, this paper elaborates the technology and methods of 1/50 000 geological hazards investigation in low mountain and hill region, with a view to helping to investigate the similar areas.