上海地质
上海地質
상해지질
2008年
2期
35~38
,共null页
雷万荣 顾琳娜 程志华 唐春梅 赵均
雷萬榮 顧琳娜 程誌華 唐春梅 趙均
뢰만영 고림나 정지화 당춘매 조균
九岭区 地质灾害 危险性区划
九嶺區 地質災害 危險性區劃
구령구 지질재해 위험성구화
Jiuning area, geo - hazard, zoning
对九岭区地质灾害发育的基本特征及其地质环境条件进行了概述,并对其形成条件进行了相关性分析;通过对地质灾害发育的基本规律、控制因素、触发因素与地质灾害关系的分析,采用环境地质学原理,建立区域地质灾害空间预测模型,圈定九岭区地质灾害的危险性分区,为实时地质灾害时间预警预报圈定有效的空间靶区。预测单元采用规则的栅格(500m×500m),共14415个单元;评价指标主要包括地形地貌、工程地质岩类、地质构造、破坏地质环境人类工程活动等四大类26个因子;利用GIS技术,提取出相关的数据信息;信息量预测方程:I1=-1.164X1-0.999X2-0.681X3+……+0.203X25-0.135X26(其中X1、X2、X3、…X26取1或0,即某单元中存在某种因素时取1、否则取0),据此计算出各单元格的信息量;根据地质灾害危险性分区临界指标,确定单元格的地质灾害危险性等级;合并同类项,并考虑类似的地质、自然环境具有类似的地质灾害问题的原则,进行归并与单元边界线的修改,得出九岭区地质灾害危险性分区。
對九嶺區地質災害髮育的基本特徵及其地質環境條件進行瞭概述,併對其形成條件進行瞭相關性分析;通過對地質災害髮育的基本規律、控製因素、觸髮因素與地質災害關繫的分析,採用環境地質學原理,建立區域地質災害空間預測模型,圈定九嶺區地質災害的危險性分區,為實時地質災害時間預警預報圈定有效的空間靶區。預測單元採用規則的柵格(500m×500m),共14415箇單元;評價指標主要包括地形地貌、工程地質巖類、地質構造、破壞地質環境人類工程活動等四大類26箇因子;利用GIS技術,提取齣相關的數據信息;信息量預測方程:I1=-1.164X1-0.999X2-0.681X3+……+0.203X25-0.135X26(其中X1、X2、X3、…X26取1或0,即某單元中存在某種因素時取1、否則取0),據此計算齣各單元格的信息量;根據地質災害危險性分區臨界指標,確定單元格的地質災害危險性等級;閤併同類項,併攷慮類似的地質、自然環境具有類似的地質災害問題的原則,進行歸併與單元邊界線的脩改,得齣九嶺區地質災害危險性分區。
대구령구지질재해발육적기본특정급기지질배경조건진행료개술,병대기형성조건진행료상관성분석;통과대지질재해발육적기본규률、공제인소、촉발인소여지질재해관계적분석,채용배경지질학원리,건립구역지질재해공간예측모형,권정구령구지질재해적위험성분구,위실시지질재해시간예경예보권정유효적공간파구。예측단원채용규칙적책격(500m×500m),공14415개단원;평개지표주요포괄지형지모、공정지질암류、지질구조、파배지질배경인류공정활동등사대류26개인자;이용GIS기술,제취출상관적수거신식;신식량예측방정:I1=-1.164X1-0.999X2-0.681X3+……+0.203X25-0.135X26(기중X1、X2、X3、…X26취1혹0,즉모단원중존재모충인소시취1、부칙취0),거차계산출각단원격적신식량;근거지질재해위험성분구림계지표,학정단원격적지질재해위험성등급;합병동류항,병고필유사적지질、자연배경구유유사적지질재해문제적원칙,진행귀병여단원변계선적수개,득출구령구지질재해위험성분구。
In this thesis, the basic characters and enviroment of the hazards in Jiuning area are summarized.And the relationships between hazards and the inducing factors are analyzed. Then the regional geo -hazard spacial prediction model is established and the zonation is finished, which provide effective spacial target for geo -hazard real -time warning and prediction for the research area. The detailed processes is:
Ⅰ Dividing the area into 14415 small regular foursquare grids with 500m length of side.
Ⅱ Selecting 4 appropriate primary evaluation indexs with 26 secondary factors, including topography, stratum, structure, and engineering by human beings. m Extracting essential data by technique of GIS to get the information prediction equation as following:
Ⅰi = - 1. 164X1 -0.999X2 -0. 681X3 + ……+0. 203X25 -0. 135X26
In the above equation, the factor in each grid is 1 when exist and 0 when not exist. So each gird will has information according to the information equation.
Ⅳ Determing the hazardous grade in each grid by the geo -hazard zonation critical value and the information amount in each grid. Ⅴ Merging the grids which have the information in a same scale and have similar geological environment and similar geo -hazard problems, and modifying the map border to get a geo -hazard zonation map for Jiuning area.