Morphotectonic indices and earthquake dataset of Batui Thrust Segment, Banggai, Indonesia

To measure the tectonic activity of a region, morphotectonic, a quantitave measurement of landscapes are carried out. Combination between geological, geomorphology, and earthquake data approach are powerful source to determine process that make up mountainous landscape. The combined data are applied to Pagimana and adjacent area, Banggai, Indonesia by dividing into eight watersheds and aim the Batui Thurst as main objective. The data comprised of 8.5m vertical resolution Digital Elevation Model (DEM) and earthquakes catalog were downloaded from the open-source database and extracted using composited GIS software. We use seven morphometry indices consist of Mountain Front Sinousity (Smf), Drainage Basin: Asymmetry Factor (AF) and Transverse Topographic Symmetry (T), Hypsometric Integral (HI), Channel Sinuosity (S), Ratio of Valley Floor Width to Valley Height (Vf), Stream Length-Gradient Index (SL), and Basin Elongation Ratio (Re) and embed them on eight watersheds which taken by remote sensing. Weighing indices and watersheds matrix also calculated to define correlation between each watershed on each index. Fieldwork also carried out to ensure the presence of Batui Thrust and other related structural geology which have been developed on the Pagimana. This dataset is potentially can be used for geologist, geophysicist and geomorpher to get new insight on the forming of East Arm of Sulawesi landscape and the Banggai-Sula Microcontinent development. Beside, the urban planner and risk assessor can be easily analyze the dataset to avoid and minimize effect of the potential earthquake hazard in the future.为量化区域构造活动，本研究开展地貌构造学（morphotectonic）相关的景观定量测量工作。融合地质、地貌与地震数据的研究路径，是解析山地景观形成过程的有力工具。本研究将上述融合数据应用于印度尼西亚邦盖地区的帕吉马纳（Pagimana）及其周边区域，将研究区划分为8个流域，并以巴图伊逆冲断层（Batui Thrust）为核心研究对象。 本次研究所用数据包括垂直分辨率8.5米的数字高程模型（Digital Elevation Model, DEM）与地震目录，均从开源数据库下载，并通过复合型地理信息系统（Geographic Information System, GIS）软件完成提取与处理。本研究选用8种地貌计量指标，包括：山前弯曲度（Mountain Front Sinousity, Smf）、流域不对称因子（Asymmetry Factor, AF）、横向地形对称性（Transverse Topographic Symmetry, T）、面积高程积分（Hypsometric Integral, HI）、河道弯曲度（Channel Sinuosity, S）、谷底宽谷高比（Ratio of Valley Floor Width to Valley Height, Vf）、河长坡降指数（Stream Length-Gradient Index, SL）以及流域伸长率（Basin Elongation Ratio, Re），通过遥感技术获取8个流域的对应参数并将各指标应用于上述流域。同时构建指标与流域的权重矩阵，以分析各流域在不同指标下的相关性。 此外本研究开展野外实地调查，以验证帕吉马纳区域内巴图伊逆冲断层及相关构造地质的发育情况。本数据集可为地质学家、地球物理学家与地貌学家提供新的研究视角，助力解析苏拉威西岛东半岛的景观形成过程以及邦盖-苏拉微大陆（Banggai-Sula Microcontinent）的演化历史。同时，城市规划者与灾害风险评估人员可便捷使用该数据集，提前规避并降低未来潜在地震灾害带来的影响。