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，本研究开展了地貌构造（morphotectonic）相关的景观定量测量工作。地质、地貌与地震数据的联合分析方法，是解析山地景观形成过程的有效研究手段。本研究将该联合数据方法应用于印尼邦盖（Banggai）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空间分辨率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，并通过集成式GIS软件完成提取与处理。本研究选取8项地貌定量指标（原文标注为7项，疑似笔误），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）、地势积分（Hypsometric Integral, HI）、河道弯曲度（Channel Sinuosity, S）、谷宽谷高比（Ratio of Valley Floor Width to Valley Height, Vf）、河长梯度指数（Stream Length-Gradient Index, SL）以及流域伸长率（Basin Elongation Ratio, Re），并通过遥感手段提取上述8个流域的对应指标参数。此外，本研究还计算了指标与流域的权重矩阵，以明确各流域在各项指标间的相关性。为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，本研究开展了野外实地考察工作。本数据集可为地质学家、地球物理学家与地貌学家提供全新的研究视角，助力解析苏拉威西岛东半岛的景观形成过程以及邦盖-苏拉微大陆的演化机制。此外，城市规划者与灾害风险评估人员可便捷使用该数据集，以规避并减轻未来潜在地震灾害带来的影响。