Analyses Of Relationship Between Advantage And Disadvantage Of Dam Engineering Construction And Ecological Protection

The waterpower resourses of our country are abundant, especially the southwest, condition of offering the convenience that the water and electricity are developed. Benefit that water and electricity develop remarkable, but the ecological environment caused provides food for thought, people no longer immerse it in the short-term local interest that the dam brings, and put the eyes on comprehensive effect of ecology produced finally. Develop the rise disputed with Nujiang, cause people's more objective treating this question. Lancang River water and electricity develop pros and cons quantize research subject whether State Environmental Protection Head Bureau environmental project assess centre self-raised subject ", this thesis was finished on the basis that " the power station environmental resources value in Jinghong is checked and calculated and studied " for the sub subject of this subject by author. Analyse the ecological environment question developed in dam from ecology, environmental science, ecological economics, angle of environmental economics in thesis, quantization ecological environmental resources value, differentiate the rationality of engineering construction and feasibility of the environment. This text divides five chapters altogether: First, introduce people new knowledge to the dam emphatically. But with the awakening of human environmental awareness and birth of the sustainable idea of development, after the ones that have gone through the dam correctly have paid homage to, worldwide, people began to examine a series of questions brought in dam closely and review again at last. It is exactly because of building the negative social and environmental question caused in dam, make people hold more and more suspicion attitudes to the dam, people no longer immerse in the short-term local interest that the dam brings, and put the eyes on comprehensive effect of ecology produced finally. Mention from bar hold the first world when the conference of the dam in storehouse of Brazil from 1997, the dam committee of the world is determined as the world against dam day on March 14 annual. Remove those ones that wear out and dam with the serious problem, resume the natural, lively river, have already become a kind of new trend, have indicated the arrival of times of the policy of the dam of changing. Second, I have estimated to the value of the environmental resources. Ecological environmental resources value is formed by two kinds of value of different nature, so adopt the vector quantity adding and method. In the type: A is the use value, depend on the utility of the environmental resources , restricts A to the utility showing with mankind's life and production in most close relations here, decide by market supply and demand , can check and calculate the law of market value . B is decided by loss caused in destruction of the ecological environment in order to compensate value. Because environmental resources have many kinds of function, must consider many value its lose. For instance the forest reserves, it destroys resulting in conserving waterand soil, the source of supply of oxygen, forfeiture improving such functions as the office ground climate, etc... Lose value can is it resume law , law of expenses and project of shade , protect expenses law method is it check and calculate to go on to adopt. What the value of the environmental resources reflected is the relation between a kind of person and environmental resources, the corresponding environmental resources have timeliness , rareness and social attribute ,etc.. So, value reflects the ecological environmental resources vary with time , place and social environment. Available density of population, abundant degree and per capita national income of environmental resources change of index is it say to come. The density of population reflects the demand level of the environmental resources, but delivery volume that abundant degree of the environmental resources reflects environmental resources, the per capita national income reflects the relation between the value of the environmental resources and economic development level. In the type, D1, D2 …Dn is the rate of change of annual border of index n. 3rd, have got the relation analytical method of pros and cons out of and established the system of index. Economic to carry on overall value analyse with ecological environmental impact society to whom irrigation works develop have. Economic and ecological environmental impact of society of the irrigation works including two parts, first , expenses andbenefit , second , between irrigation works and loss compensation should paid that ecological environment cause , project of itself. To to economic to carry on overall value check and calculate with ecological environmental impact society have irrigation works, it is on the basis of overall comprehensive society , economic and environmental benefit and environmental cost, probe into the feasibility of engineering construction of water conservancy. Make use of feasible index of ecological environmental impact to probe into the feasibility of engineering construction, the formula is as follows: …In the type: It is ecological environmental impact feasible for index, lose value always by project value and ecological environment not overall than, when ≥is at 1 o'clock, this project is feasible, acts as <1, the project is not feasible; It is the use value of the project, satisfied with the deciding usefully of demands of people by this project, it is a total benefit minus capital construction investment of the project of the project, namely NPV (require NPV> 0 here, the feasible scheme in namely the foundation of the project is analysed). Compensation value of project, namely project this for pollution ecological loss actual advance expenses (most projects are not considered at present, real B =0); E Lose the current value for the value of the ecological environmental resources. As A>EC, can 0 in principle, compensate, but project is it is it is it make financial benefit of project this reduce to compensate to go on to influence to environmental outside; And at A 0. As one o'clock such as...