| The Three-Gorges project had been well known to most people in the world for a long time,which is a huge and famous water hinge conservancy and has obvious economical benefit and engineering functions such as shipping , preventing flood and generating electricity. In the meanwhile, The structure and function of its zoology environment will be influenced obviously because of the form of the Three-Gorges reservoir. As we know that TP and TN contamination along the Changjiang River valley, especially along the some main sub-rivers such as Wujiang river valley, were raise more higher than the standard level of national water quality at most times. Hydrographic conditions would changed when Three-Gorges reservoir had been constructed, eutrophication might take place in the whole reservoir area. So that an important task to solve on water envoironmental prevention in Three-Gorges reservoir will be necessary.The causes and some other key factors on creating the valley eutrophication, microcosmic and chemic mechanism of algal growth have been analyzed in this paper,which could be the references for further study and prediction on valley eutrophication in the reservoir area. As we know that rapid algal growth could result in algae blooms in a large-scale, which is a biochemistry dynamic process involved in photosynthesis. Chloroplast is the essential energy transformable system of algal growth, it can turn abio-phosphate and ADP(Adenosine biphosphate) into ATP(Adenosine Triphosphate) for storaging energy under the condition of enough sunlight, and this is also necessary for the algal growth. As environment conditions change, there will be a reversible process that ATP turns into ADP in order to release energy, and this is propitions to algal decomposition. These might reflect inherent mechanisms of biochemistry reaction and energy transform during algae blooms in microcosmic level. Based on local monitoring data from representative valleys along the Three-Gorges during algae blooms, the activation energy(ΔE) of green alga photophosphorylation is studied, the effective energy Δe and the compositive nutritional index TLI(∑) in these water areas under different hydrological conditions are computed carefully, and then the algae blooms evaluative Function F has been established, the computing results and local inspecting data indicate that F is more reasonable, persuasive and generalizable than TLI(∑) to predicate and desoribe algae blooms or eutrophication in the water area. Algal bloom is one of complex kinetics process in which there must be some biologic chemistry reactions. According to measuring data of various relative pollution materials such as various nitrides, phosphides and chlorophyll along the Three-Gorges valley, and with introducing a special controlling function of new strong nonlinear coupling dynamics model, in which could be used to describe complex behavior and process of green algal bloom to exist in slow flow, we has studied in detail algal growth mechanism and found some strong interactions and some inherence rules when N and P concentration absorbated by algae body varied with the different P and N concentration in the valley. The ratio factor ωi/cx of the nutritious absorption coefficient of algae ωi to nutritious material concentration cx reveals not only the influence relation about nutrition content absorbated by the algae at different algal concentrations, but also characterizes the some correlations between algae growth and various effects of different nutritious material absorbated by the algae. |
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