摘要
１９９１年度在苏南丘陵地区用径流小区法测得杉木林、火炬松林、栎林及裸地的地表径流系数分别为９．５５％、３８．９９％、６．０１％、４５．３７％。土壤侵蚀量分别为２８１．０ｔ／ｋｍ￣２、２２５．４ｔ／ｋｍ￣２、２３８。４ｔ／ｋｍ￣２、１４４１４．５ｔ／ｋｍ￣２。与裸地相比，森林保持水土的效益非常显著。文中还详细讨论了裸地的土壤侵蚀规律，并给出了裸地土壤侵蚀量的经验预报方程。
The surface runoff and soil erosion of different forest types were studied onthe hills of Southern Jiangsu Province in l991.The runoff coefficients of Chinesefir,loblolly pine,oak forest and barren land were 9.55%,38.99%,6.01%and 45.37%, The soil erosion in these areas was 281.ot·km￣(-2),225.4t·km￣(-2),238,4t.km￣(-2) and I4414.5.km￣(-2) respective. In this paper ,some regression equations showing the relations between the soil erosion and pre- cipitation characteristics in the barren land were estabilished.
出处
《长江流域资源与环境》
CAS
CSCD
1994年第1期55-59,共5页
Resources and Environment in the Yangtze Basin
关键词
水土保持
林型
苏南丘陵
vegetation types,water and soil conservation,precipitation characteristics,regression equation
