Monthly soil erosion risk maps for Swiss permanent grassland, with average soil loss in tons/(ha*month), March

Monthly soil erosion risk maps for Swiss permanent grassland with a spatial resolution of 100m. The maps show the average soil loss in tons per hectare and month. Shades of green, yellow and red mean a low, average and high risk of erosion, respectively.The monthly soil erosion risk maps were calculated using the Revised Universal Soil Loss Equation (RUSLE). For this RUSLE application, the monthly dynamic of the rainfall erosivity factor (R-factor) and cover and management factor (C-factor) was considered as follows: A(month)= R(month)*K*C(month)*L*S*P where A(month) is the soil loss in tons per hectare and month and R(month) and C(month) are the monthly R-factor (MJ mm ha⁻¹ h⁻¹ month⁻¹) and C-factor (dimensionless). The other erosion factors are soil erodibility (K-factor), slope length (L-factor), slope steepness (S-factor) and support practices (P-factor). The RUSLE factors were tailored to the specific environmental conditions of Swiss permanent grassland. The P-factor was included in the calculation as a constant with value 1 due to a lack of spatial information on grazing management and its effect on soil erosion.本数据集涵盖瑞士永久性草地的月度土壤侵蚀风险地图，空间分辨率达100米。该地图展示了每公顷每月的平均土壤流失量（单位：吨）。其中绿色、黄色与红色的深浅色调分别对应低、中、高土壤侵蚀风险等级。本月度土壤侵蚀风险地图基于修正通用土壤流失方程（Revised Universal Soil Loss Equation, RUSLE）计算生成。针对该模型的应用场景，本次计算纳入了降雨侵蚀力因子（R-factor）与覆盖管理因子（C-factor）的月度动态变化，具体计算公式如下：A(月)= R(月)*K*C(月)*L*S*P。其中A(月)代表每公顷每月的土壤流失量（单位：吨），R(月)与C(月)分别为月度降雨侵蚀力因子（单位：MJ·mm·ha⁻¹·h⁻¹·month⁻¹）和月度覆盖管理因子（无量纲）。其余侵蚀因子分别为土壤可蚀性因子（K-factor）、坡长因子（L-factor）、坡度因子（S-factor）与水土保持措施因子（P-factor）。所有RUSLE因子均针对瑞士永久性草地的特定环境条件完成了定制化适配。由于缺乏放牧管理及其对土壤侵蚀影响的空间数据，本次计算中将P因子设为恒定值1。