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加拿大新布伦斯威克西北部的圣约翰河流域上游 ,随着马铃薯的生产 ,水蚀日益严重 ;由于马铃薯地过量径流的产生 ,土壤流失量达 2 0 0 0～ 30 0 0t/ (km2 a)。通过实施梯田、等高耕作、变坡引水渠和草皮水道等措施 ,每年可减少径流 15 0mm ,从而增加马铃薯可利用水分 ;同时 ,土壤流失量也降至 10 0t/ (km2 a) ,并且能改变流域局部水文特性 ,减少洪涝灾害的发生。
In the upper reaches of Saint John’s basin in northwestern New Brunswick, Canada, water erosion is worsening with the production of potatoes; due to the excessive runoff of potato, soil loss amounts to 2000 ~ 3000t / (km2 a ). By implementing measures such as terraced fields, contouring tillage, diversion slops and grassland waterways, the annual runoff can be reduced by 150 mm, thereby increasing the potable water availability. At the same time, the amount of soil loss is also reduced to 10 0 t / (km2 a) Change the hydrological characteristics of local watershed to reduce the occurrence of floods.