Extensive management of field margins enhances their potential to mitigate soil erosion

Soil erosion is a widespread problem in agricultural landscapes, particularly in regions with strong rainfall events. Vegetated field margins can mitigate negative impacts of soil erosion by trapping eroded material. In this data set, we present data of sediment trapped by 12 field margins during the monsoon season of 2013 in an agricultural landscape in the Haean-myun catchment in South Korea. Prior to the beginning of monsoon season, we equipped a total of 12 sites representing three replicates for each of four different types of field margins (\"managed flat\", \"managed steep\", \"natural flat\" and \"natural steep\") with Astroturf mats with a size of 34 cm x 25 cm (850 cm**2). The mats (n = 15 / site) were installed at three levels: upslope, immediately before the field margin to quantify the sediments that reach it, in the middle of the field margin to quantify the locally trapped sediments, and after the field margin at the downslope edge to quantify the sediments that leave the field margin to the next field or to the stream. Sediment was collected after each rain event until the end of the monsoon season.

土壤侵蚀是农业景观中普遍存在的环境问题，在强降雨频发区域尤为突出。植被覆盖的农田边际带可通过拦截侵蚀泥沙，缓解土壤侵蚀带来的负面影响。
本数据集收录了韩国Haean-myun流域农业景观中，2013年季风季期间12处农田边际带所拦截的泥沙数据。
季风季开始前，我们在12处试验点位布设了仿真草皮垫（Astroturf mats），单块尺寸为34 cm × 25 cm（面积850 cm²）。该12处点位对应4类农田边际带：人工平整型（managed flat）、人工陡坡型（managed steep）、自然平整型（natural flat）及自然陡坡型（natural steep），每类设置3个重复样地。
每个点位布设15块草皮垫，分别安装在三个监测位置：其一为上坡处、紧邻农田边际带上游，用于量化抵达该边际带的泥沙总量；其二为农田边际带中部，用于量化本地拦截的泥沙量；其三为农田边际带下游的下坡边缘，用于量化流出该边际带、进入下一块农田或溪流的泥沙量。
每次降雨事件后均收集泥沙样品，直至季风季结束。