STUDIES ON THE DESIGN AND CONSTRUCTION OF THE NANJING GUQUAN RURAL ECOLOGICAL PROJECT.X.Study on Application of Structural Model for Nanjing Guquan Ecological Engineering Experimental Farm
This paper covers the probems emerged in the process of urbanization from the ecological landscape point of view,and puts forward an option of urban landscape planning based on simulation.
Byapplying the principles and methods of landscape ecology, this paperdiscussed some approaches to the adjustment and control of ecologicallandscapes, including ecological planning, design and management oftourist landscapes.
Based on review of international and domestic studies of urban waterfront restoration,the basic theories, key technologies, application of landscape ecology and demonstration projects related to ecological restoration of urban waterfront are discussed. The city can be sustainable developed through ecological restoration of urban waterfront.
From the theories of landscape-ecology,visuallandscape and ecological environment,the auther evaluates visual environment quality and two other features by Spatial superimposition analysis with GIS technology.
The rolling development model of ecological economy combined water conservancy construction with schistosomiasis control
Existence of nonnegative solutions for degenerate ecological models
Estimated Forest Ecological Water Requirements in the Jinghe Watershed-Theory and Case Study
The ecological water requirement of forests is defined as the water resources used to maintain and improve the natural balance of forest ecosystems, which can be expressed by evapotranspiration of trees during the growing season.
Therefore, they can be taken as the minimum and the suitable ecological water requirements of the forest.
The two superpowers,the Soviet Union and the United States,have given much publicity to an“ecological crisis”.They claimed that environmental pollution has upset the“inherent balance”in the ecological system on which mankind relies for the existence,that it will inevitably lead to“catastrophe and death”. Such fallacies are mainly reflected in their basic views on“ecological balance” and their attitude toward it as well as the root cause of its destruction etc. It is metaphysical to regard“ecological...
The two superpowers,the Soviet Union and the United States,have given much publicity to an“ecological crisis”.They claimed that environmental pollution has upset the“inherent balance”in the ecological system on which mankind relies for the existence,that it will inevitably lead to“catastrophe and death”. Such fallacies are mainly reflected in their basic views on“ecological balance” and their attitude toward it as well as the root cause of its destruction etc. It is metaphysical to regard“ecological balance”as something absolute.With this erroneous standpoint,one will certainly fail to recognize the decisive role played by man in the relations between man and nature.This is decided by bourgeois world outlook and class nature.It is absolutely not the“erroneous actions of man- kind”that constitutes the root cause to upset“ecological balance”but the system of capitalist expolitation.Only when socialism replaces capitalism,people will be able to constantly know nature in depth and transform it,upset old equilibrium in a planned way and set up a new one and push forward the cause of socialism sys- tematically and step by step.
In this paper the authors have made scientific researches on the causes of the damages done to the fishery resources on the basis of the article The effects of water quality pollution of the 2nds songhu river on the fishery resources”.It covers four aspects: (1) The trunk reaches of the 2nd songhua river and its pollution inrecent years; (2) The work having been done and the methods employed; (3) The monitorings of the pollutants which are hurtful to fishery resources in the river water;the effects on the planktons,the...
In this paper the authors have made scientific researches on the causes of the damages done to the fishery resources on the basis of the article The effects of water quality pollution of the 2nds songhu river on the fishery resources”.It covers four aspects: (1) The trunk reaches of the 2nd songhua river and its pollution inrecent years; (2) The work having been done and the methods employed; (3) The monitorings of the pollutants which are hurtful to fishery resources in the river water;the effects on the planktons,the ovipositi- ng sites:the embryonic development of fishes and the commodity value of the fishing acouisitions; (4) the synthetic assessment of the organic pollution in the middle and lower reaches of the 2nd songhua river; the principal pollutants caus- ing damages to the fishery resources;the effects on the interferences and dnmages done to the ecological equibrium;and the suggestions for further study.
BHC removal effeciency of the oxidation pond system at YL region averages 80% over a period of three years. Factors responsible for purification of BHC in oxidation ponds are discussed. Removal of BHC from water takes place by several routes: first, BHC degrades in alkaline medium but is relatively stable in acid environment. pH of the oxidation pond is found raised because of the fact that the consumption of free CO2 by photosynthesis of algae is faster than its liberation through respiratory process of the...
BHC removal effeciency of the oxidation pond system at YL region averages 80% over a period of three years. Factors responsible for purification of BHC in oxidation ponds are discussed. Removal of BHC from water takes place by several routes: first, BHC degrades in alkaline medium but is relatively stable in acid environment. pH of the oxidation pond is found raised because of the fact that the consumption of free CO2 by photosynthesis of algae is faster than its liberation through respiratory process of the heterotrophs. pH in oxidation ponds at YL region varies from 7.0 to 10.3. Thus, higher pH values due to ecological factor provide a favorable condition for efficient removal of BHC. Secondly, BHC accumulates in phytoplankton and zooplankton in the oxidation ponds. Studies show that accumulation factor of Scenedismus oblq. and Moina was 213 and 32, respectively. The concentration of BHC adsorbed from water depends upon both the concentration of BHC in water and the biomass of algae and zooplankton. Hence, algae and zooplankton as "carriers" play an important role in transporting BHC from water to bottom sediments. Thirdly, BHCWas degraded under anaerobic condition. Bottom mud of oxidation ponds is good in adsorbing BHC. The distribution coefficient of BHC is 80. Rapid degradation of BHC has been observed in sediments of oxidation ponds. Under laboratory conditions BHC degradation rate can be accelerated by repeated additions of BHC into the bottom mud. The maximum rate attained is 3.8mg/hr/kg mud. Owing to anaerobic degradation, BHC content in the sediment of oxidation ponds has not increased over a period of three years.
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