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Many experiments have verified that Sabina vulgaris shrubs had distinguished advantage in anti-drought, but a lot of past works were primarily focused on its eco-physiological characteristics, with its growth model almost never explored. In this work, the primary model of S. vulgaris shrubs is discussed and improved based on the dual-scale automaton model with the data from experiments. The diversification...
Soil moisture is an important variable in the climate system and it has sensitive impact on the global climate. Obviously it is one of essential components in the climate change study. The Integrated Biosphere Simulator (IBIS) is used to evaluate the spatial and temporal patterns of soil moisture across China under the climate change conditions for the period 1960-2006. Results show that the model...
Municipal solid waste incinerator by-products include fly ash and air pollution control residues. In order to transform these wastes into reusable species, soluble alkali chlorides must be separated and toxic trace elements must be stabilized. In this paper, alkali chlorides can be extracted efficiently in an aqueous extraction step combining a calcium phosphate gel precipitation. In such a process,...
This paper presents a investigation of pollution originating from coal ash in Jingangshan thermal power station Jiangxi province China. About half of coal ash obtained by coal combustion in the power plant is mixed with ash-flushing water (most of the ash-flushing water from Ganjiang river) and transported to the ash field through the pipeline. In order to assess pollution caused by leaching of some...
What is the relationship between vegetation patterns and climate changes in China? The geographic distribution of vegetation types in China in the past 100 years and future was simulated based on climatology using a small set of plant functional types (PFTs) embedded in the biogeochemistry biogeography model BIOME4. Results show that as time goes by, vegetation sensitivity to climate change is a increasing...
This paper applies the analytic approach of the ecological footprint to calculate and compare the ecological footprint and the ecological capacity of Fujian province over the period from 1993 to 2002 and Taiwan province over two periods from 1981 to 1990 and from 1993 to 2002. The results indicate that land demand per capita of both Fujian and Taiwan increased year by year while the ecological capacity...
Microbial decontamination of petroleum-polluted soils has been recognized to be an efficient, economical and versatile alternative for physical or chemical treatments. In this study, different components of petroleum in contaminated soil were investigated under optimal environmental conditions which were determined by previous experiments. An aerobic bacteria with the ability to utilize both hydrocarbons...
In this study, coking wastewater was treated using different coagulants to make it meet requirements of the secondary standard described in ldquoIntegrated wastewater discharge standardrdquo. Coagulation using PFS and PAC respectively was performed to study effect of coagulant dosage, and pH on removal ratios of colority, CODcr and turbidity. It is found that optimum dosage and pH are 50 mg/L and...
With the fast development of Chinese economy, expressway, as the most important portion of the highway networks, had been developed at an astonishing fast speed, which brought on increasingly severe ecological environmental problems in the mean time such as soil and water loss, damage of vegetation ecosystem, geological environment and water environment etc. As a result, the ecological environmental...
The regional eco-environment quality is the base of the sustainable development. This paper developed an eco-environmental vulnerability evaluation model using spatial principle component analysis (SPCA) and eco-environment vulnerability index method. This method was carried out in a case study of Hubei Province, China. The vulnerability was classified into six levels: potential, slight, light, medial,...
In order to investigate the retardation of water evaporation by single and mixed monolayers at air/water surface, surface pressure (pi)-time (t) isotherms, specific evaporation resistance (r)-temperature (T) curves had been used to describe the properties of monolayers made from single monolayers of 1-hexadecanol (C16OH) and mixed monolayers of C16OH and nonionic surfactants. The results showed that...
In order to investigate abilities of anti-environmental interference of water evaporation retardants, a new kind of water evaporation retardants composed of 1-hexadecanol and nonionic surfactants was prepared in this paper, and effects of environmental factors on retardation of water evaporation of mixed monolayers were studied. The results showed that in comparison with monolayers of single component,...
A novel kind of the hydrochloric acid fume retardant was prepared with the long chain fatty alcohols and the nonionic surfactants in this work. The results showed that the film-forming materials could spread as monolayers quickly and spontaneously at the hydrochloric acid surface. The mixed monolayers exhibited considerably larger effective resistance to hydrochloric acid fume when the concentration...
In order to promote the energy utilization efficiency and reduce the environmental pollution in the process of lignite direct utilization, lignite briquette and its coke were prepared. The effects of pyrolysis temperature and holding time on the briquette coke were investigated through the pyrolysis experiments of lignite briquette. The results showed that the changes of yield, volatile, ash, fixed...
Now more and more application demand to spatio-temporal database is proposed and the spatio-temporal data model is the fundamental basic to spatial-temporal database. But till today the study on spatio-temporal data model still more concerned with the theory research. The article proposes a new model-the change-of-feature based spatio-temporal object relational data model by researching and analyzing...
A bench-scale experimental system was conducted to study properties of activated carbon adsorption for mercury removal in flue gas. The test method used here for mercury concentration was cold-vapor atomic fluorescence spectroscopy (CVAAS). Mercury breakthrough efficiencies of activated carbon in different simulated flue gas systems were studied in typical constituent flue gas system. The conclusions...
The genetic diversity and differentiation between wild and hatchery Haliotis asinina populations were tested by allozyme and AFLP techniques. The results from allozyme technique showed that there was a decline in mean number of alleles per locus, percentage of polymorphic loci and observed heterozygosity and a change in allele frequency in three loci, SDH-1, AAT-1 and EST-1. Allelic richness, percentage...
Amplified fragment length polymorphism technique has been applied to detect the genetic diversity and differentiation of three wild Haliotis ovina populations in Hainan province, China. High level of genetic diversity was detected among the populations. The mean effective number of alleles per locus was from 1.2027+0.3090 to 1.3530+0.3404, with an average of 1.2969+0.3338. The percentage of polymorphic...
Information on genetic diversity and differentiation is essential for conservation and stock improvement programs. AFLP technique was applied to analyze the genetic diversity and differentiation of one wild and three hatchery Haliotis diversicolor supertexta populations. In general, our results showed a reduced genetic diversity in the three hatchery populations when compared with the one wild population...
This paper discusses the unique climatic resource in the Xiangxi river valley. The features of the climatic resource in the area can be concluded as follows: 1. It is very warm in winter and frost period is short. 2. According to the sea level elevation, the mountains can be divided into several climatic zones. 3. Precipitation is even around the whole year so that rainfall can be used effectively...
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