沂沭断裂带活动构造的流域地貌分析  

CATCHMENT GEOMORPHIC PROPERTIES OF ACTIVE TECTONICS IN YISHU FAULT ZONE

作　　者：刘非非[1] 杜国云[1] 

机构地区：[1]鲁东大学资源与环境工程学院,烟台264025

出　　处：《第四纪研究》2016年第2期453-463,共11页Quaternary Sciences

基　　金：山东省自然科学基金项目（批准号：ZR2013DL006和2015zrb01303）和烟台市科技项目（批准号：2013ZH094）共同资助

摘　　要：基于流域地貌对活动构造的响应，采用DEM数据对流域地貌进行量化分析是当前新构造研究的热点。本文以SRTMDEM为数据源，在流域分割基础上，提取了白浪河、潍河、沭河、沂河4个跨沂沭断裂带的流域、共计148个亚流域的地貌参数，包括流域面积-高程积分（HI）、河长坡降度（sL）、流域盆地不对称度（AF）和流域盆地形状指数（Bs）4个单一流域地貌参数及相对构造活动强度（Iat）的综合地貌参数。结果显示：区内亚流域HI值均小于0．35，表明区域流域演化阶段属于老年期；流域地貌参数在沂沭断裂带空间上存在明显的差异性：昌邑-大店断裂（F1）北部和鄌郚-葛沟断裂（F4）南部有较高的Bs值，安丘-莒县断裂（F2）南部有较高的SL、AF值，沂水-汤头断裂（F3）中部和鄌郚-葛沟断裂（F4）北部有较高的HI、sL和AF值；总的来讲，AF和Bs与区域活动构造空间关系较为密切，sL的异常峰值区很好的显示了历史强震发生地的构造活动强度，HI响应程度较弱；按照Hamdouni和Irigaray的Iat值分级标准显示，强构造活动区域集中在3个区域：一，过汞丹山向sE方向的莒县方向延伸；二，零散分布在沂南以东且断续向sE向的左山方向延伸；三，沿东地堑的活动断层和F1层分布。前两个区域与沂沭断裂带西侧的一组NW-SE的区域断裂一致，第三个区域与沂沭断裂带活动断层（F5）和F1一致。流域地貌分析结果所得到的强构造活动区域中可能存在的活动断层之前和活动断层之后的响应过程，将为未来区域地震的发生提供流域地貌空间信息，可能会为地震预测提供一个新的途径。In recent years, quantitative analysis of the regional tectonic activity using the geomorphic parameters extracted by DEM has received considerable attention in the field of neotectonics. The survey region is confined to latitude 34°20′- 37°08′N and longitude 117°07′- 119°42′E located in the central of Shandong Province. And it belongs to denudation landform of hilly and mountainous area in the central south of Shandong. The terrain is high in west and low in east and the highest altitude is 1126 meters. Yishu Fault Zone consists of four major faults which are Changyi-Dadian Fault （F1 ）, Anqiu-Juxian Fault （ Baifenzi-Rulaishan Fault） （ F2 ）, Yishui-Tangtou Fault （ F3 ） and Tangwu-Gegou Fault （F4）. These faults belong to Shandong section of Tanlu Fault Zone from east to west. In this work, four unicity geomorphic parameters including hypsometric integral （HI）, stream-gradient index （SL）, drainage basin asymmetry （AF）, drainage basin shape （Bs） and one comprehensive index of relative active tectonics （Iat） for four river drainage basins of Bailang River, Weihe River, Yihe River and Shuhe River across the Yishu Fault Zone, have been extracted by the GIS technique based on SRTM DEM date as data source. These basins contain 148 sub-basins which are composed of 34, 27, 40 and 47 sub-basins for Bailang River, Weihe River, Yihe River and Shuhe River, respectively. The calculated results for HI value illustrate that the values range from 0.09（ B3-1 ） to 0.35（S1-15）. The hypsometric curves appear as a concave shape. HI values are divided into 3 parts （ HI ≥ 0.26, 0.15 ≤ HI 〈 0.26 and HI 〈 0.15 ） according to the feature of hypsometric curves by 0.1 value gap. SL, AF, Bs, and fat values range from 18.12（B2-2） to 4511.96（Y1-7）, 12.11（W2-1） to 91.39 （S2-3）, 0.06（W1-13） to 12.11（Y4-2）, and 1.5 to 3.0, respectively. Results show that all HI values of the sub-basins are less than 0.35, indicating that the evolutionary phase of the dra

关 键 词：SRTM DEM 流域地貌参数 活动构造 沂沭断裂带 

分 类 号：P931.2[天文地球—自然地理学] P542