延安市南沟某处滑坡体区域地处黄土高原典型地貌区，地貌类型以黄土丘陵和沟壑地形为主，地势高低起伏显著，滑坡等地质灾害活动频繁且具有明显的区域性发育特征。滑坡区表层覆盖厚层第四纪黄土，该类黄土具有高孔隙率和较强渗透性的结构特征，极易受到降雨等外部水文因素的影响，导致其物理力学性质显著变化，进而降低滑坡体整体稳定性。为揭示该滑坡体内部地质结构，在滑坡体范围内布设了3条测线，结合被动源和主动源面波探测方法，以获取高分辨率的浅层速度结构，为后续滑坡机制分析与稳定性评估提供基础数据支持。
", "ds_source": "测线布设方案如下：1号被动源测线：布设于滑坡体东侧，自山顶平台向北西方向延伸，台间距为2 m，采用等间距台站布设方案，台间距为2 m，主要用于获取滑坡体该侧的自然地震响应与浅层波速结构。
\n2号被动源测线：呈对角线布设，台间距为2 m，沿滑坡体主滑动方向展开，覆盖了滑坡体核心区域及其主坡面。该测线设计旨在捕捉黄土滑坡体在水动力作用下结构变化的自然响应，以期揭示其关键滑移特征。
\n3号主动源/被动源联合测线：基本沿1号测线布设方向设置，整体位置略有偏移，以满足落锤激发等主动震源实验操作的空间需求。该测线兼顾了主动与被动源面波数据的采集，可实现对比分析，提高结构解析精度。
\n1号与2号测线之间的水平距离约为20 m。测线整体布设综合考虑了滑坡体的几何形态、地貌特征及水文条件，确保对滑坡体不同部位的地震响应进行有效覆盖与交叉验证。本方案旨在实现对滑坡体浅层结构及其潜在滑动机制的多角度、多尺度探测，为黄土滑坡灾害的风险评估与预警提供科学支撑。
", "ds_process_way": "基于smartSolo采集的原始波形，经格式转换、质量筛选与重采样后，确保后续处理使用。
", "ds_quality": "数据采集方案设计合理，测线覆盖滑坡关键部位，确保了原始波形信号具备捕捉浅层结构变化的潜力。
", "ds_acq_start_time": "2024-08-15 00:00:00", "ds_acq_end_time": "2025-04-18 00:00:00", "ds_acq_place": "延安", "ds_acq_lon_east": 36.7, "ds_acq_lat_south": 10.15, "ds_acq_lon_west": 36.61666666666667, "ds_acq_lat_north": 10.216666666666667, "ds_acq_alt_low": null, "ds_acq_alt_high": null, "ds_share_type": "apply-access", "ds_total_size": 936111590, "ds_files_count": 0, "ds_format": ".bin", "ds_space_res": "10m", "ds_time_res": "日", "ds_coordinate": "无", "ds_projection": "", "ds_thumbnail": "eda5a331-2d18-4fd4-9ce9-3eba06fb2b8c.png", "ds_thumb_from": 0, "ds_ref_way": "", "paper_ref_way": "", "ds_ref_instruction": "数据详细信息参见：刘雨婷.基于主/被动源多阶面波的滑坡体内部结构成像方法研究[D].长安大学.", "ds_from_station": "", "organization_id": "bf138922-7121-438c-8d1b-19d5f751c907", "ds_serv_man": "李红星", "ds_serv_phone": "0931-4967592", "ds_serv_mail": "ncdc@lzb.ac.cn", "doi_value": "", "subject_codes": [], "quality_level": 0, "publish_time": "2026-05-25 11:18:32", "last_updated": "2026-05-25 11:18:32", "protected": false, "protected_to": null, "lang": "zh", "cstr": "11738.11.ncdc.loess.db7376.2026", "i18n": { "en": { "title": "Validation Data for the Joint Active and Passive Source Inversion Strategy in the Yan'an Area", "ds_format": ".bin", "ds_source": "The survey line layout is designed as follows:\r\n
Passive Source Line 1: Deployed on the eastern side of the landslide mass, it extends from the hilltop platform towards the northwest. A uniform station spacing of 2 meters was adopted. This line is primarily intended to capture the natural seismic response and delineate the shallow-wave velocity structure on this flank of the landslide.\r\n
Passive Source Line 2: Arranged diagonally with a station interval of 2 meters, this line follows the main sliding direction of the landslide. It covers the core area and the main slope face. Its design aims to capture the natural responses of the loess landslide to hydrodynamic forces, thereby revealing its key slipping characteristics.\r\n
Combined Active/Passive Source Line 3: This line was set up roughly parallel to Line 1, with a slight overall offset. This adjustment was made to accommodate the spatial requirements for active source experiments, such as hammer-impact excitations. The line facilitates the simultaneous acquisition of both active and passive surface wave data, enabling comparative analysis and enhancing the resolution of the structural interpretation.\r\n
The horizontal distance between Line 1 and Line 2 is approximately 20 meters. The overall layout comprehensively considers the landslide's geometry, geomorphological features, and hydrological conditions, ensuring effective coverage and cross-validation of seismic responses from different parts of the landslide body.\r\n
This deployment strategy is designed to achieve multi-angle and multi-scale probing of the landslide's shallow structure and its potential sliding mechanism. It aims to provide scientific support for risk assessment and early warning systems for loess landslide hazards.", "ds_quality": "
The data acquisition plan is well-designed, with survey lines covering key areas of the landslide, ensuring that the raw waveform signals possess the potential to capture changes in shallow structures.", "ds_ref_way": "", "ds_abstract": "
The landslide mass at Nangou, Yan'an City, is situated within a typical Loess Plateau landscape, characterized by loess hills and gullies. This area exhibits significant topographic relief and is highly prone to frequent geological hazards, such as landslides, with distinct regional developmental patterns. The landslide area is blanketed by thick Quaternary loess, known for its high porosity and permeability. This structure makes it particularly susceptible to external hydrological factors like rainfall, which can significantly alter its physical and mechanical properties and thereby reduce the overall stability of the slope.\r\n\r\nTo reveal the internal geological structure of the landslide, three survey lines were established across the site. A combination of passive and active surface wave methods was employed to obtain a high-resolution profile of the shallow shear wave velocity (Vs). This data provides critical support for subsequent analysis of the landslide mechanism and stability assessment.", "ds_time_res": "", "ds_acq_place": "Yan'an", "ds_space_res": "", "ds_projection": "", "ds_process_way": "
Based on raw waveforms acquired by smartSolo, the data undergoes format conversion, quality screening, and resampling to ensure readiness for subsequent processing.", "ds_ref_instruction": "For detailed data information, please refer to Liu Yuting Research on Imaging Method of Internal Structure of Landslide Body Based on Multi order Surface Waves of Active/Passive Sources [D]. Chang'an University" } }, "submit_center_id": "ncdc", "data_level": 0, "recommendation_value": 0, "license_type": "https://creativecommons.org/licenses/by/4.0/", "doi_reg_from": "reg_local", "cstr_reg_from": "reg_local", "doi_not_reg_reason": null, "cstr_not_reg_reason": null, "is_paper_in_submitting": false, "ds_topic_tags": [ "滑坡体", "主被动源地震数据" ], "ds_subject_tags": [], "ds_class_tags": [], "ds_locus_tags": [ "延安" ], "ds_time_tags": [ 2024, 2025 ], "ds_contributors": [ { "true_name": "包乾宗", "email": "qzbao@chd.edu.cn", "work_for": "陕西省地质调查院", "country": "中国" } ], "ds_meta_authors": [ { "true_name": "包乾宗", "email": "qzbao@chd.edu.cn", "work_for": "陕西省地质调查院", "country": "中国" } ], "ds_managers": [ { "true_name": "包乾宗", "email": "qzbao@chd.edu.cn", "work_for": "陕西省地质调查院", "country": "中国" } ], "category": "灾害" }