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By analyzing the development of Wuhan city and the change of Wuhanpsilas lake resource, this paper gained the results that the main reasons of lake atrophy are large area of lake filling ,the industrial sewage and the house refuse contaminating and negative effects of putting up dykes,and among them the most outstanding one is the invading and occupying of buildings. At the end of this paper there...
Industrial wasteland tourism has rapidly developed in China. In this review, we discussed the progress in tourism resources and tourism planning, including value evaluation of tourism resources, resources and products development, development orientation of tourism, tourism landscape planning method and technology, and the international successful cases. The results show that in contrast to other...
According to hydrologic similarity, that means the grids of the same topographic index were classified into the same runoff unit, TOPMODEL calculates runoff yield. However, spatial heterogeneity of basin terrain and geomorphology information such as rainfall and topographic index statistics distributed curve etc. is not considered. This paper, trough treating basin DEM, obtains sub-basins based on...
The specific studies are carried out according to the problem of the high concentration of fluorine in Yangshapao Lake, which is a most important multi-purpose reservoir of Diversion Project from Nenjiang River to Baicheng City in Western Jilin Province. After the diversion is actualized, the release of fluorine from the sediment may influence the water quality in the reservoir. Based on the problem...
Al-pillared montmorillonites (Al-MMT) were synthesized from natural occurring sodium montmorillonite through the exchange of inter-lamellar ions with hydroxyalumina polycations. Furthermore, the morphology, composite structure and pore properties of such composite materials were investigated by Powder X-ray Diffraction (XRD), Fourier Transformation Infra-red Spectra (FTIR) and Nitrogen Adsorption-Desorption...
A study was initiated in a small semi-arid catchment with reforestation history to elucidate the soil change. Results showed that land use pattern was closely related with terrain conditions and human disturbance levels. Soil properties under four typical human-disturbed land use types (orchard, shrub, cropland and reforested land) were compared. Significant differences were found for total nitrogen...
In view of the defect of traditional water quality evaluation model, a probabilistic neural network (PNN) is developed to evaluate surface water quality in Jining. Probabilistic neural network is a new type neural network consisting Radical Basis network and compete neural network, which is simple in structure, easy for training and wide used. PNN model is applied to evaluate water quality at representative...
With the development of social and economic, the pollution in river is worse. It is very important to study river pollution. In view of the uncertainty of river water pollution, Velocity and dispersion coefficient and attenuation in river are considered as uncertainty parameters and expressed as grey parameters. One dimensional gray numerical water quality model is developed according to gray theory...
In view of the defect of traditional water quality evaluation model, based on fuzzy neural network theory, a new model of fuzzy neural network (FNN) comprehensive evaluation is developed to evaluate surface water quality in Suzhou. Fuzzy neural network is a new type neural network consisting radical basis network and compete neural network, which is simple in structure, easy for training and wide...
In view of the deficiency of classic method evaluating water quality. A grey relational analysis model is proposed to evaluate water quality in river. The principle of grey relational analysis and its process are introduced. Suzhou river was selected and assessed by using this method. And it was found that, compared with the fuzzy complex judgment method, the result was remarkably different. The possible...
The continuous decline of ground water level is one of the important factors that affect development of national economy and society. Based on the DE-BP (back propagation-differential evolution) neutral network, the predicting model of ground water level is presented. The precision of the model is checked using the monitoring data in Zhangjiakou area. The comparisons between the predicted results...
Because of the toxicity property of chromium in the water, it is important for the water environment to monitor the trace chromium with a kind of simple and sensitive method. Spectrophotometry of CAS and CTMAB is adopted to determine chromium in the Fu-yang river. The results indicates that the detected limit of this method is 0.0005 ug/mL, the mark-on recovery ranged from 87.7% to 97.0% and relative...
Basing on the monitoring data of water quality of LiuJiazhuang section and the analysis results of 4 years, applying fuzzy comprehensive evaluation model, according to LtEnvironmental quality standard for surface waterGt to establish the relevant subjection functions, the quality evaluation of surface water in LiuJiazhuang section is made in this paper. The result shows that the change about the water...
Effects of Ca(NO3)2 stress on the growth, membrane permeability and antioxidant enzyme activities of cucumber seedlings were investigated. Two cucumber cultivars (Chun 4 and Jinyou 1) were used by sand culture. The results were as follows: relative water content (RWC) of the leaves and roots in two cultivars all decreased when Ca(NO3)2 stress increased. Meanwhile, the membrane permeability, malondialdehyde...
There is increasing interest in the role of hydrogen peroxide (H2O2) in regulating growth and death in plants. This research aimed to reveal the effect of H2O2 on the germination characteristics of cucumber seeds. H2O2 concentrations(0, 0.01, 0.1 and 1 mmol ldr L-1) were set up to study the effect of different treatments on such indexes as the germination rate, the germination potential, germination...
The water right trade should consider externality (water quality degradation) elimination to maintain environment. The externality is evaluated using water quantity and quality model. Externality elimination follows with the principle that environmental requirement is satisfied with minimum pollution emission reduction. A case study is made in the midstream of Heihe River in Northwest China. The result...
Green production logistics applies the theories and methods of green manufacturing to the production logistics system. To combine with the process control theory, logistics simulation technique and information technology, green production logistics is capable of reducing the harm to the environment and improving the energy utilization rate of the production logistics system. The connotation and the...
The water quality of groundwater in Jining has been assessed comprehensively based on the environmental investigation and monitoring in order to provide the scientific basis for the pollution treatment in the Jining city. This paper discussed the choice of the evaluated factors, the operations of the weight value, and compares with the status of the water quality in the course of the evaluation. The...
Water Contaminations bring not only great damage to the ecological balance, but also serious losses to the national economy. The results of existing methods, which are used to calculate Economic Loss of water contaminations, are not able to reflect the problem explicitly. In view of deficiencies of those calculation methods, and on the base of mechanism model of pollution loss, the logistic equation...
Nutrients concentrations in surface and core sediments from Lake Nansihu were investigated. The results showed that sediments from Lake Nanyang had significantly higher TP concentrations than any other area of Lake Nansihu. Lake Dushan suffered from the highest TOC and TN content. Lake Zhaoyang had low TOC, TN and TP concentrations. The method of 137Cs dating was used to derive accumulation rates...
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