中文摘要：

通过GIS技术模拟了黄土高原坡耕地人工锄耕10°坡面的微地形模型,并将栅格大小划分为0.3,0.6,1.0,3.0,5 cm和7.5 cm,以期探讨微地形尺度对地表水文特征的影响。结果表明：①RR、MUD和T指标计算的地表糙度各不相同。其中,RR和MUD受栅格大小的影响较小,T值随栅格的增大明显减小。②MDS值与地表糙度指标呈相同的变化趋势。③栅格大小对Linsley产流模型（1949）影响明显,当P-F值小于2.5 cm时,微地形对地表产流和蓄水特征具有影响。④地表蓄水面积与地表水位线呈明显的正相关性,当地表水位线高于0.015 m后,蓄水面积迅速增大,原来相互分离的洼地相连,地表产流增大。因此,微地形尺度对地表水文特征具有明显的影响。

英文摘要：

The micro-DEM of artificial hoed sloping field（10°） in loess plateau with grid cell resolution of 0.3 cm,0.6 cm,1.0 cm,3.0 cm,5.0 cm and 7.5 cm respectively was simulated by GIS to discuss the influence of microtopography scale on surface hydrological characteristics.The calculated surface roughness by indexes of RR,MUD and T are different,among which,RR and MUD are less affected by grid cell resolution while T is decreased obviously with the increase of grid cell resolution.The variation trends of MDS and surface roughness index are the same.The influence of microtopography scale on surface runoff yield and water storage characteristics are significant when P-F value was less than 2.5 cm,and microtopography scale has evident influence on Linsley runoff producing model.The surface water storage area and surface water level has positive correlation.When surface water level is higher than 0.015 m,water storage area increases rapidly and original isolated depressions are connected and surface runoff increases.The analysis shows microtopography scale has obvious influence on surface hydrological characteristics.