激光扫描技术在坡耕地土壤侵蚀监测中的应用

Application of laser scanner in soil erosion monitoring of cultivated slope land

为了研究激光扫描技术应用于土壤侵蚀监测的可靠性,利用3D激光地貌分析仪对黑龙江省水土保持科技示范园内坡耕地径流小区土壤侵蚀进行监测。采用恒定降雨强度(20、40、60、80、100和120 mm/h)对径流小区进行连续6次等历时(30 min)人工降雨,每场降雨前后使用3D激光地貌分析仪对小区内不同位置的坡面形态进行扫描,并与集流桶收集土壤侵蚀量进行对比分析。结果表明:3D激光扫描分析法与集流桶测量法得到的土壤侵蚀量之间具有良好的线性相关关系,3D激光地貌分析仪用于径流小区内土壤侵蚀测定具有较高的精度与可靠性。

In order to study the reliability of the laser scanning technology for soil erosion monitoring,the soil erosion of the runoff plot in Soil and Water Conservation Demonstration Park,Heilongjiang Province,was measured with 3D laser scanner system.To calculate the amount of soil erosion,the surface morphology at different slope positions was scanned by using this system before and after artificial rainfall with stable intensities（20,40,60,80,100,120 mm/h,and 30 minutes）.In addition,to make a calibration on the system,simultaneously,the calculated soil erosion was compared with the soil erosion amount in collecting tanks.The results indicate as follow： there is an excellent linear relationship between the soil erosion amount measured with 3D laser scanner and collecting tanks.Hence,the application of 3D laser scanner in soil erosion monitoring has a bright future due to its higher accuracy and reliability.