Developing pitirrigation agriculture is an important part of soil and water conservation comprehensive management in a watershed in rainfall fed agricultural area,a way of crop planting from extensive management to intensive management,and a key point to realize sustained development of small watershed economy.
Base on soil and water conservation comprehensive management, by the end of 2002, the control area of soil erosion had added up to 10333km 2; erosion control ratio had reached 61.8%. In the control process, the way of soil and water conservation for eco-environment conservation having feature of Dingxi was put forward and the situation of eco-environment was improved evidently.
the DRCA should be more than 60 000 m3/km2 if the sediment reduction effect of the comprehensive watershed control of soil and water conservation achieves 20%.
In compliance with the Code for Economic Assessment of Water Conservancy Construction Projects(SL72-94)and the Method for Benefit Calculation of Soil and Water Conservation Comprehensive Harnessing(GB/T15774-1995),and taking the soil and water conservation project of the small Tiewa river basin for example,methods for calculating the direct economic benefit of soil and water conservation are investigated,including the calculation of work volume,cost and economic benefit indexes.
Shen-fu Coal-field in North Shaanxi formed during Jurassic period, one of the world famous coal-fields, will be an important base of superior quality coal for export and power in China. If no efficient measures should be taken, opening of the mine and associated road building, setting-up of power stations and other capital constructions on large scale, will surely creat the problems of huge water loss, serious soil erosion and environment pollution. Basing on investigation, this article predicts the local w...
The Cement Plant of Yaoxian County, a large state model interprise, has caused sedimentition downhill movement because it has not taken efficient measures to hold a large amount of stripped loess soil and mountsin cover while as in mining. The released sedimentation has deposited in a reservior, covered fields, blocked traffic, increased the sediment concentratiou to the river channel and threatened the production and living of the local inhabitanbs. The plant has been fined 200,000 Yuan RMB under the Rules...
The principal achievements by the committee of soil and water conservation of Shandong Province in the last three years were:1)one's understanding:2)making the guide to work clear;3)making new advances in the path of harnessing;4)raising further comprehensive results;5)making a new development in comprehensive type of harnessing,resulting in obvious economic and ecological results.However,these areas which have been harnessed is only 20-30% of the whole,a large square is being faced with more serious loss o...