Regularities of wind-erosion of different land-use types in Yongding River sandy land, Beijing |
| |
| Authors: | Depeng Yue Yongbing Liu Runguo Zang Xian Wang |
| |
| Institution: | (1) The Key Laboratory for Silviculture and Conservation of the Ministry of Education, Beijing Forestry University, Beijing, 100083, China;(2) Key Laboratory of Environmental Change and Natural Disaster, Ministry of Education; College of Resources Science and Technology, Beijing Normal University, Beijing, 100875, China;(3) The Research Institute of Forest Ecology and Environment, Chinese Academy of Forestry, Beijing, 100091, China |
| |
| Abstract: | The threshold wind velocity of a number of variables was studied in four different land-use types: farm land, forestland,
wild grassland and a flood plain in the Yongding River sandy land in Beijing. The variables studied were transport of sand,
underlying surface roughness, windblown sediment, wind-sand flow structure, soil mechanical composition and amount of wind
erosion. The following conclusions were drawn: 1) The order of decreasing threshold of wind speed for sand displacement and
surface roughness were forestland, wild grassland, farm land, sparse wild grassland and flood plain. 2) There were significant
differences in sand flux among different ground covers. At a height of 0–20 cm, the height increased while the sediment discharge
percent of sand flux decreased; there were significant differences in the sand flow formation under different land-use types.
3) The mechanical composition of sand particles consisted mainly of silver sand in the flood plain and sparse wild grassland,
and of silver sand, particle silver sand and floury sand in other land-use types. 4) The amounts of wind erosion and sand
sediment were different among different land-use types. Increased vegetation cover and change in farming techniques were suggested
to prevent and control wind erosion of sand and soil.
__________
Translated from Scientia Silvae Sinicae, 2005, 41(4) 译自: 林业科学, 2005, 41(4)] |
| |
| Keywords: | Yongding river sandy land land-use types wind erosion |
| 本文献已被 SpringerLink 等数据库收录！ |
|
