Potential soil map per parcel (2013)

The potential soil map per parcel (2013) shows the total potential erosion of a given agricultural parcel by means of a class division. The total potential erosion does not take into account current land use (grassland or cropland) and is the sum of processing erosion and water erosion. Erosion by water is a process in which soil particles are separated and transported by raindrops and run-off water, either low over a large surface area or concentrated in poles and rays. This leads, among other things, to a decrease in soil quality and productivity, but also to significant damage caused by mud nuisance in downstream (residential) areas. It may be argued that erosion is one of the most important forms of soil degradation in Flanders. The potential soil map per plot is based on the percel map 2012. As the 2012 percel map does not cover the whole of Flanders, part of the agricultural use data was derived from a classified satellite image of OCGIS Flanders. However, this picture contains only land use information and no parcel information, which will obviously result in a much lower quality of calculations for this area. The potential soil map per plot was prepared through computer modelling with a spatial resolution of 5 m (Physical and Regional Geography Research Group, Department of Earth and Environment Sciences, K.U.Leuven). The calculation of water erosion is based on the revised universal soil loss equation or R.U.S.L.E. (Revised Soil Loss Equation, Renard et al, 1991). It is an empirical model that calculates the average annual soil erosion rate per unit of area due to intergeulsion and geulsion as a product of 6 factors: The processing erosion was calculated using Software based on the watersedem model.2013年地块尺度潜在土壤图通过分级划分的方式，展示了指定农业地块的总潜在侵蚀程度。总潜在侵蚀未考虑当前土地利用类型（草地或耕地），由耕作侵蚀（processing erosion）与水蚀（water erosion）共同构成。水蚀是指雨滴与径流分离并搬运土壤颗粒的过程，既可能在大面积地表以薄层漫流形式发生，也可能集中于细沟与沟谷。这一过程不仅会降低土壤质量与农业生产力，还会在下游居住区域引发泥浆淤积带来的严重危害。可以认为，侵蚀是佛兰德斯地区最为重要的土壤退化形式之一。 本次地块尺度潜在土壤图基于2012年地块图制作。由于2012年地块图未覆盖佛兰德斯全境，部分农业用地数据源自佛兰德斯OCGIS的分类卫星影像。但该影像仅包含土地利用信息，并无地块属性数据，显然会导致该区域的计算精度大幅下降。 本数据集通过空间分辨率为5米的计算机建模方法制作（比利时鲁汶大学地球与环境科学系自然与区域地理学研究组）。水蚀计算基于修正通用土壤流失方程（Revised Universal Soil Loss Equation，简称RUSLE，Renard等，1991），该经验模型通过6个因子的乘积，计算单位面积年均土壤侵蚀速率，涵盖细沟间侵蚀与细沟侵蚀过程。耕作侵蚀（processing erosion）则通过基于Watersedem模型开发的软件完成计算。