Soil erosion represents one of the most important destructive phenomenon of the soil, through surface and depth erosion. The activity of water erosion in Albania is favoured from some factors like relief, geological s...Soil erosion represents one of the most important destructive phenomenon of the soil, through surface and depth erosion. The activity of water erosion in Albania is favoured from some factors like relief, geological structure, slope, soil, etc. Erosion depth growth is closely related with the vegetal cover ravage high rate and in the first instance that of woodland flora in sloping ground. The degradation of the flora or total destruction of it is defined from many factors, but in notably from social-economical system of every country. It can be also seen some special areas in our country were the results of the human negative impacts in natural environment. The erosion phenomenon is more problematic, especially during intensive raining time.展开更多
The economic benefit of sediment reduction by pine forest and black acacia forest at different age classes in Miyun reservoir watershed was studied using the approach of relocation cost based on the field survey from ...The economic benefit of sediment reduction by pine forest and black acacia forest at different age classes in Miyun reservoir watershed was studied using the approach of relocation cost based on the field survey from 1996 to 1999. The results show that if the transportation of eroded soil into Miyun reservoir was estimated as 100%, the economic benefit of sediment reduction by pine forest would be 59-164 RMB yuan/ha（RMB yuan = Renminbi yuan, or yuan） per year （US$1=8.27 RMB yuan during the period of research）, and 58-134 yuan/ha by black acacia forest. The average economic benefit of sediment reduction by forest is 130 yuan/ha per year. If r （the rate at which the eroded soil will enter a reservoir） varies, the economic benefits of sediment reduction also change. To estimate the economic benefit of sediment reduction more accurately, r should be measured from the field test. The results from this study provide information to help assess the feasibility of the environmental project in thids area.展开更多
文摘Soil erosion represents one of the most important destructive phenomenon of the soil, through surface and depth erosion. The activity of water erosion in Albania is favoured from some factors like relief, geological structure, slope, soil, etc. Erosion depth growth is closely related with the vegetal cover ravage high rate and in the first instance that of woodland flora in sloping ground. The degradation of the flora or total destruction of it is defined from many factors, but in notably from social-economical system of every country. It can be also seen some special areas in our country were the results of the human negative impacts in natural environment. The erosion phenomenon is more problematic, especially during intensive raining time.
文摘The economic benefit of sediment reduction by pine forest and black acacia forest at different age classes in Miyun reservoir watershed was studied using the approach of relocation cost based on the field survey from 1996 to 1999. The results show that if the transportation of eroded soil into Miyun reservoir was estimated as 100%, the economic benefit of sediment reduction by pine forest would be 59-164 RMB yuan/ha（RMB yuan = Renminbi yuan, or yuan） per year （US$1=8.27 RMB yuan during the period of research）, and 58-134 yuan/ha by black acacia forest. The average economic benefit of sediment reduction by forest is 130 yuan/ha per year. If r （the rate at which the eroded soil will enter a reservoir） varies, the economic benefits of sediment reduction also change. To estimate the economic benefit of sediment reduction more accurately, r should be measured from the field test. The results from this study provide information to help assess the feasibility of the environmental project in thids area.
