中文摘要：

大面积梯田的修筑，极大地改变了地表微形态，使地表坡度、径流路径和汇流方式发生改变，进而影响到土壤侵蚀强度。基于5m分辨率的DEM数据，利用真实田坎信息构建梯田DEM，采用AGREE算法对梯田DEM进行预处理，通过比较分析不同集水面积阈值提取的梯田DEM沟道信息，初步探索合适的填洼算法和流向算法应用于梯田DEM的水流路径模拟。结果表明：利用M&G算法填洼处理，MFD-md算法确定流向，能够更好的模拟梯田区域的水流路径。

英文摘要：

Large areas of terraces greatly changed the surface micro-morphology so as to affect the terraced surface water flow path and soil erosion. Based on 5 m resolution DEM data, the paper adopted the actual ridge-based method to build terrace DEM and used AGREE algorithm to pre-process terrace DEM, then compared the information of terrace DEM flow path under different catchment area threshold to explore proper fill sinks algorithm and flow direction algorithm applied to the terraces DEM flow path simulation. Results showed that using the M&G algorithm to fill sinks and MFD-md algorithm to determine flow could better simulate the terraced fields flow path.