Surface mining irreversibly disturbs the landscape. A first order priority is to establish an erosionally stable landscape. Soil and surface material particle size has a strong influence on soil erosion and a number of erosion models have been developed based on the relationship with particle size. Here we highlight the practicalities of assessing material particle size for a post-mining landscape. In particular, the CAESAR-Lisflood landscape evolution model (the focus here) requires a defined material particle size as input. A key feature which differentiates CAESAR-Lisflood (the model used here) is the ability to apply particle size data at the same resolution as the digital elevation model (DEM) representing the landform surface. Here we develop particle size distributions influence erosion for a potential post-mining landform. Field data from the site demonstrates that material particle size distribution changes little over a ten year period and yet a strong influence on erosion rates.

露天采矿不可逆转地干扰了景观。第一要务是建立侵蚀稳定的景观。土壤和表层材料的粒径对土壤侵蚀有很大的影响，并根据与粒径的关系开发了许多侵蚀模型。在这里，我们重点介绍了为采矿后景观评估材料粒径的实用性。特别是，CAESAR-Lisflood景观演化模型（此处为重点）需要定义的材料颗粒大小作为输入。区分CAESAR-Lisflood（此处使用的模型）的关键特征是能够以与代表地形表面的数字高程模型（DEM）相同的分辨率应用粒度数据。在这里，我们开发了粒径分布，以影响潜在的开采后地貌的侵蚀。