时间重力测量,战役和永久GNSS以及干扰测量雷达技术:在得克萨斯州沿海地区量化土地变形速率的比较方法
Amanda Beattie1, Mohamed Ahmed1, Tianxing Chu2
1Department of Physical and Environmental Sciences, Texas A&M University-Corpus Christi, Corpus Christi, TX 78412, USA.
The Science of the total environment
|November 2, 2024
概括
德克萨斯州沿海曲地区的土地沉降率很高,工业区的土地沉降率高达-3.8毫米/年. 这项研究使用InSAR和GNSS量化了变形,为沿海弹性提供了见解.
科学领域:
- 地质科学 地质科学
- 环境科学 环境科学
- 遥感 遥感 遥感 遥感
背景情况:
- 沿海地区面临着土地沉降和海平面上升的重大威胁,导致洪水增加和基础设施损坏.
- 了解土地变形对于有效的沿海管理和减轻危险影响至关重要.
研究的目的:
- 用多种技术量化德克萨斯州沿海曲地区的土地变形率.
- 在地方和区域范围内调查土地沉降的控制因素.
- 评估不同地质测量方法的有效性,以监测土地变形.
主要方法:
- 活动利用了全球导航卫星系统 (GNSS) 和时间重力测量在六个地点两年.
- 在五年内使用交叉测量合成孔径雷达 (InSAR) 和15个永久GNSS站进行区域范围的分析.
- 比较来自重力,活动GNSS,InSAR和永久GNSS的数据,以评估测量的一致性和可靠性.
主要成果:
- 在SAR和永久GNSS数据显示了一致的土地变形速率 (分别从-12.16 ± 0.12到+11.70 ± 0.00毫米/年和-14.0 ± 0.6到+9.0 ± 3.0毫米/年),表明时空变化.
- 在沿海城镇,城市,内陆城镇和工业设施中观察到显著的沉降率,归因于沉积物凝结,断层和资源开采.
- 引力和竞选GNSS数据之间的不一致性被发现,可能是由于测量周期短和数据采集不频繁.
结论:
- InSAR和永久GNSS可靠地监测沿海地区的区域性土地沉降情况.
- 德克萨斯州沿海的土地沉降是由多种因素驱动的,包括自然过程和人为活动.
- 这些发现提供了关键数据,以提高当地海平面上升的估计,并支持沿海社区制定减缓和弹性战略.
相关概念视频
01:30Types of Global Positioning System Surveys
50
GPS surveying methods vary in application, accuracy, and data collection techniques, catering to diverse surveying and mapping needs. Static GPS, kinematic GPS, and real-time kinematic (RTK) surveying are widely used. Each technique offers distinct advantages.Static GPS involves placing one receiver at a known reference point and another at the target point. It collects exact positional data by observing multiple satellite ranges over an extended period, achieving centimeter-level accuracy for...
50
01:25Methods of Obtaining Topography
56
Topography involves measuring and mapping land elevations, natural features, and artificial structures to create accurate representations of the terrain. Topographic surveying relies on traditional and modern methods, each with distinct advantages and limitations.Traditional Surveying Methods:Transit stadia surveys and plane table surveys were widely used traditional surveying methods. These techniques relied on instruments like theodolites and stadia rods for measuring distances and angles,...
56
01:05Gravimetry: Overview
5.0K
Gravimetric analysis is a quantitative method where the analyte is isolated and weighed directly or after conversion into a substance of known composition. Gravimetric analysis can be classified as precipitation, electrogravimetry, volatilization, and particulate gravimetry, based on the method used to isolate the analyte.
In precipitation gravimetry, the analyte is converted into a precipitate and weighed. For example, the silver content in a sample can be estimated by precipitating and...
In precipitation gravimetry, the analyte is converted into a precipitate and weighed. For example, the silver content in a sample can be estimated by precipitating and...
5.0K
01:26Influence of Earth's Curvature and Atmospheric Refraction on Leveling
57
During leveling, the Earth's curvature and atmospheric refraction introduce deviations in the line of sight from a true horizontal reference. When the line of sight is leveled, it remains perpendicular to the plumb line only at a single point. Beyond this, it deviates due to the Earth’s curvature, represented by the correction C. For a sight distance D, the deviation can be derived using the relationship:This relationship shows that the deviation increases quadratically with distance.
57
01:30Design Example: Identifying the Locations of Monuments in the Field Using Global Positioning System Device
24
Surveyors use Global Positioning System (GPS) technology to measure the precise location and elevation of points on Earth. In a recent survey, GPS receivers were used to determine the coordinates and elevations of two park monuments. The process involved careful mission planning, data collection, and correction to ensure accuracy. The survey began with mission planning to identify optimal satellite visibility and minimize Position Dilution of Precision (PDOP). A geodetic control point...
24
01:28Field Application of Global Positioning System
35
The Global Positioning System (GPS) has become an indispensable tool in fieldwork, offering unparalleled precision and efficiency for surveying, navigation, and infrastructure development. By harnessing signals from a constellation of satellites, GPS receivers determine the location of objects with remarkable speed and accuracy, often completing calculations within a second.Advantages of Modern GPS TechnologyContemporary GPS receivers are designed to meet the practical demands of field...
35