地质调查与研究
地質調查與研究
지질조사여연구
GEOLOGICAL SURVEY AND RESEARCH
2013年
2期
136-145
,共10页
滑坡%地质灾害%陕西凤县
滑坡%地質災害%陝西鳳縣
활파%지질재해%협서봉현
Feng County%landslide%susceptibility assessment
滑坡易发性评价是滑坡早期预警的基础,为了探索适用于秦岭山区的区域滑坡易发性评价方法,本文在陕西凤县1:5万详细调查的基础上,针对山区地质灾害调查的特点,对传统信息量模型进行改进,利用ArcGIS软件基于改进的信息量模型完成了凤县滑坡易发性评价。结果显示:凤县地质灾害分布主要与植被覆盖率、河流侵蚀和人类工程活动相关。根据评价结果将凤县滑坡易发性划分为四个等级:高易发区面积165 km2,占全县总面积的5.2%;中易发区面积686 km2,占21.5%;低易发区面积1195 km2,占37.5%;基本安全区面积1141 km2,占35.8%。根据此评价结果,为陕西凤县土地利用规划和滑坡防治提供依据,并为秦岭山区的区域滑坡易发性评价提供思路和方法。
滑坡易髮性評價是滑坡早期預警的基礎,為瞭探索適用于秦嶺山區的區域滑坡易髮性評價方法,本文在陝西鳳縣1:5萬詳細調查的基礎上,針對山區地質災害調查的特點,對傳統信息量模型進行改進,利用ArcGIS軟件基于改進的信息量模型完成瞭鳳縣滑坡易髮性評價。結果顯示:鳳縣地質災害分佈主要與植被覆蓋率、河流侵蝕和人類工程活動相關。根據評價結果將鳳縣滑坡易髮性劃分為四箇等級:高易髮區麵積165 km2,佔全縣總麵積的5.2%;中易髮區麵積686 km2,佔21.5%;低易髮區麵積1195 km2,佔37.5%;基本安全區麵積1141 km2,佔35.8%。根據此評價結果,為陝西鳳縣土地利用規劃和滑坡防治提供依據,併為秦嶺山區的區域滑坡易髮性評價提供思路和方法。
활파역발성평개시활파조기예경적기출,위료탐색괄용우진령산구적구역활파역발성평개방법,본문재협서봉현1:5만상세조사적기출상,침대산구지질재해조사적특점,대전통신식량모형진행개진,이용ArcGIS연건기우개진적신식량모형완성료봉현활파역발성평개。결과현시:봉현지질재해분포주요여식피복개솔、하류침식화인류공정활동상관。근거평개결과장봉현활파역발성화분위사개등급:고역발구면적165 km2,점전현총면적적5.2%;중역발구면적686 km2,점21.5%;저역발구면적1195 km2,점37.5%;기본안전구면적1141 km2,점35.8%。근거차평개결과,위협서봉현토지이용규화화활파방치제공의거,병위진령산구적구역활파역발성평개제공사로화방법。
Landslide susceptibility assessment is the basis for landslide early warning. In order to develop assess-ment methods of regional landslide susceptibility in Qinling mountain area, Fengxian County of Shaanxi Prov-ince, the authors comprehensively analyzed the geo-hazard investigation and mapping of 1:50000 scale. Accord-ing to the features of investigation in mountain area, this paper modifies the traditional information model. With ArcGIS and modified information model, the landslide susceptibility evaluation of the whole area of Fengxian County was carried out. According to the result, the distribution of landslide is mainly affected by river erosion, vegetation coverage and human activities. And the whole area was divided into four categories: the high grade ar-ea, which covers 165 km2, accounting for 5.2% of the total study area; the medium grade area, which covers 686 km2, accounting for 21.5%; the low grade area, which is measured 1195 km2, taking up for 37.5%; and the stable area that is measured 1141 km2, taking up for 35.8%. The result provided a basis for construction layout and land-slide prevention and reduction in Fengxian County, and also provided the guideline for landslide susceptibility zo-nation in other counties of the Qinling Mountain area.