ABSTRACT

There is increasing interest in the use of unmanned aerial vehicles (UAVs) as cost-effective, high-resolution alternatives to satellites for the environmental monitoring of large areas. In this study, we tested the feasibility of using UAV-acquired soil surface temperature to monitor groundwater level in a peatland undergoing groundwater restoration to mitigate fire risk (Tanjung Leban, Indonesia). We used two UAVs (Inspire 1, with an infrared camera, and Phantom 4) to map soil surface temperatures at 459 points on bare land. Using a spline analysis of groundwater-level and elevation data in Arc GIS 10.6, we produced ground elevation and groundwater table maps and measured the groundwater level (depth from the ground surface) at each bare-land point. Spearman’s rank correlation analysis determined a negative correlation between the soil surface temperature and groundwater level. Our study shows that soil surface temperature is a reliable proxy for groundwater level in tropical peatlands. This proxy can be monitored cost-effectively using UAVs equipped with infrared cameras.

摘要

人们越来越关注使用无人机作为具有成本效益的高分辨率卫星替代品，以进行大范围环境监测。在这项研究中，我们测试了使用无人机获取的土壤表面温度来监测正在恢复地下水以减轻火灾风险的泥炭地中的地下水位的可行性（印度尼西亚丹绒·勒班）。我们使用了两架无人机（带有红外摄像头的Inspire 1和Phantom 4）来绘制裸地上459个点的土壤表面温度。使用Arc GIS 10.6中的样条线分析地下水位和高程数据，我们绘制了地面高程和地下水位图，并测量了每个裸地点的地下水位（距地面的深度）。Spearman秩相关分析确定了土壤表面温度与地下水位之间的负相关。我们的研究表明，土壤表面温度是热带泥炭地地下水位的可靠替代指标。使用装有红外摄像头的无人机可以经济高效地监视此代理。