Soil moisture is a key factor governing the hydrology and environment of local area. This study of soil moisture distribution and regularity plays an important role for soil erosion prevention, soil and water loss control and environment recovery in theory and practice. In our research, soil moisture contents in typical mountains in Dongjiang were measured by TDR in many locations with different land covers, land- form, soil characteristics, land surface slopes in different slope position. Their influencing factors were revealed on the basis of the observation data. The results show that water holding capacity has a significant increase tendency from the mountain higher to lower portion, from soil surface to deep, because of the decrease of sand content and the increase of soil viscidity. Landform and surface vegetation cover affects the distribution of soil moisture content acutely. Soil moisture content in surface with sparse vegetation depends on topographic change. Soil moisture is higher at the top than at the bottom, and decreases significantly in the areas with sharper slope surface. Moreover, hillside on shady slope is wetter than sunny one. Soil moisture content with better forest depends on the pattern of vegetation cover. It is greater under vegetation canopy than in the bare sites. The above achievements offer some important reference for soil and water loss control and ecological environment protection.
Research of Soil and Water Conservation
soil moisture distribution