The soil surface characteristics of vegetation stripes in Northern Mexico and their influences on the system hydrodynamics - An experimental approach

被引:29
作者
Janeau, JL
Mauchamp, A
Tarin, G
机构
[1] Inst Ecol, Durango, Mexico
[2] Inst Ecol, Xalapa 91000, Ver, Mexico
[3] Cenid Raspa, Gomez Palacio, Dgo, Mexico
关键词
Chihuahuan desert; soil surface features; vegetation stripes; rainfall simulation; hydrodynamics; Mexico;
D O I
10.1016/S0341-8162(98)00059-9
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
Vegetation stripes were described in arid areas of Africa, Australia and Mexico. They depend on the local concentration of rain water after runoff. In Mexico, we described the soil surface characteristics of vegetation stripes and performed rainfall simulations to analyze its hydrodynamic behaviour. Simulations were performed on plots characterized by the four soil surface features represented in the stripes. Four types of surface crusts were found in the stripes, erosion, sedimentation, and two types of structural crusts. The less vegetated plots had relatively impervious crusts with low preponding rains and high constant runoff rates. On the contrary, the highly vegetated plot had a thin crust and abundant litter which allowed a high infiltration rate. Runoff rates were positively related to rainfall intensity. Those relationships between surface characteristics and runoff determine the fate of rain water and may allow the prediction of the amount of runoff for a specific rain on a given plot. (C) 1999 Published by Elsevier Science B.V. All rights reserved.
引用
收藏
页码:165 / 173
页数:9
相关论文
共 23 条