基于Rose和Manning方程的拉加威河小流域土壤侵蚀空间量化研究

IF 0.4 4区 环境科学与生态学 Q4 ENVIRONMENTAL SCIENCES
Victorino A. Bato, E. Paningbatan, V. Ella, A. Alcantara, R. Cruz, P. Sanchez
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引用次数: 0

摘要

建立了一个动态物理模型来预测菲律宾马加特河流域的子流域Lagawe河子流域的土壤侵蚀。安装了翻斗式雨量计以收集基于事件的降雨数据,并在拉加韦河的直线段安装了水位记录仪以收集水深。沉积物样本是在暴雨期间采集的,用于校准模型。曼宁方程用于计算地表径流和水流速度。使用Rose和Freebairn方程计算沉积物质量。使用PCRaster软件将地理信息系统作为建模工具。该模型估计,2015年台风科普(当地名称,兰多)期间共产生57905000 m3的侵蚀沉积物。在测得的产沙量和模型输出之间的统计分析中,Welch双样本t值为-0.25,p值为0.81。由于p值大于0.05(5%),因此物理动力学模型的输出与产沙量的测量值之间没有显著差异。同样,相关分析支持这一结论,R2值为0.74,呈线性正。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Using Rose’ and Manning’s Equations to Spatially Quantify Soil Erosion in Lagawe River Sub- Watershed, Ifugao, Philippines
A dynamic, physical model was created to predict soil erosion of Lagawe River Sub-watershed, a sub-watershed of Magat River Watershed, Philippines. Tipping-bucket rain gauge was installed to gather event-based rainfall data and a water-level recorder was installed on a straight segment of Lagawe River to gather water depth. Sediment samples were taken during rainstorm events and were used to calibrate the model. Manning’s equation was used to calculate surface runoff and stream flow velocity. Rose’ and Freebairn’s Equation was used to calculate sediment mass. Geographic Information System was utilized as a tool for modelling using PCRaster Software. The model estimated a total of 57,905,000 m3 of eroded sediments which was generated during Typhoon Koppu (local name, Lando) in year 2015. A Welch Two Sample t-value of -0.25 and a p-value of 0.81 was achieved on the statistical analysis between the measured sediment yield and the output of the model. Since the p-value is greater than 0.05 (5%), there is no significant difference between the output of the physical dynamic model and the measured value for sediment yield. Likewise, the correlation analysis supports this conclusion with a linearly positive R2 value of 0.74.
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来源期刊
CiteScore
0.90
自引率
0.00%
发文量
10
审稿时长
2 months
期刊介绍: The Journal of Environmental Science and Management (JESAM) is an international scientific journal produced semi-annually by the University of the Philippines Los Baños (UPLB). JESAM gives particular premium to manuscript submissions that employ integrated methods resulting to analyses that provide new insights in environmental science, particularly in the areas of: environmental planning and management; protected areas development, planning, and management; community-based resources management; environmental chemistry and toxicology; environmental restoration; social theory and environment; and environmental security and management.
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