Liaocheng City Research Articles

Research on Sustainable Development of Ecology Based on Ecological Footprint Theory - Case Study of Liaocheng City in ShanDong Province

Ecological footprint theory is used to evaluate the eco-environmental conditions by calculating the area of regional productive land. The research would estimate the environmental sustainability of the lifestyle of residents in Liaocheng city using the ecological footprint as the indicator of consumption. At first, the related conceptions of ecological footprint will be introduced, then analysis the disparity between consumption demand and available supply on the basis on data from statistical yearbook of Shandong Province in 2011. The result shows that the ecological footprint exceeds 27.9 times of ecological carrying capacity which indicate that the city was in unsustainable situation in 2011.

Quantitative Study on Eco-Environmental Water Demand of Urban Water System

Eco-environmental water demand of urban water system should be that of certain quality, which is necessary for it to develop its normal functions. The water system includes Dongchang Lake, Tuhai River and Old Canal in Liaocheng City, Shandong Province, China. The multiannual mean optimum, medium and minimum eco-environmental water demand of Dongchang Lake are respectively 2922.9×104m3, 2334.7×104m3 and 1746.4×104m3. Those of Tuhai River are respectively 4757.9×104m3, 2865.7×104m3 and 1919.7×104m3. Those of Old Canal are respectively 348.0×104m3, 277.9×104m3 and 207.9×104m3. Then those of the water system in Liaocheng City are respectively 8028.8×104m3, 5478.3×104m3 and 3874×104m3. These results can provide basis for protecting its eco-environment and promoting its sustainable usage.

Residues and Spatial Distribution of Organochlorine Pesticides in Arable Land from Liaocheng

In order to determine the residues and the distribution characteristics of organochlorine pesticides (OCPs) in arable land from Liaocheng City, 136 soil samples were collected using lattice method. The samples were extracted by accelerated solvent extraction (ASE), the residual amounts of 8 types of OCPs, including α-BHC, β-BHC, γ-BHC, δ-BHC, p,p′-DDE, p,p′-DDT, p,p′-DDD and o,p′-DDT, were analyzed with GC-ECD. With the aid of software of SPSS and ArcGIS, residues and spatial distributions of 8 OCPs were analyzed. The results showed that all OCPs had different detectable rates and residual amounts. p,p′-DDE was the primary pollutant in arable land of Liaocheng. Its detectable rate and average residual amount were both highest, 92.65% and 74.16µg•kg-1 respectively, over the first grade criteria (50µg•kg-1) of the national standard for soil environment quality, while the residual amounts of the other OCPs were at a low level and didn't pollute the arable land. The results of spatial distribution showed that the 8 OCPs varied greatly. β-BHC distributed widely, and the others were relatively concentrated. There was a significant difference of γ-BHC and DDTs between Linqing county and the other counties, and the residual amounts in Linqing were highest, and there was no obvious difference among the other counties

The Road of Complexity, the Road of Rehabilitation — Discussion of Detailed Planning for Protection and Renovation of the Southeast Area in the Ancient City of Liaocheng

The revival of historic districts is a major issue that the urban development is facing, combined with the detailed planning for protection and renovation of the southeast area in the ancient city of Liaocheng, this paper narratives the idea of the revival of historic districts in detail from the cultural connotations, business climate, traditional style, living conditions and implementation strategies and so on, expecting to provide useful ideas on protection, renewal and rehabilitation of the current historic districts.

Pollution characteristics, ecological risk and sources of polycyclic aromatic hydrocarbons (PAHs) in surface sediment from Tuhai-Majia River system, China

Sixteen polycyclic aromatic hydrocarbons (PAHs) of surface sediment samples collected from 9 sites of the Tuhai-Majia River system were analyzed. The total PAH concentrations ranged from 311.69 to 3736.32ng/g for dry weight. On average, 2-, 3-, 4-, 5- and 6-ring PAHs consisted of 30.19%, 28.48%, 20.22%, 14.73% and 6.38% of total PAHs, respectively. The risk quotient (RQ) was used to assess the ecological risk of PAHs. The mean values of RQ(MPCs) calculated for individual PAHs were lower than 1.0, with the exception of naphthalene (1.23). RQ∑PAHs calculated for samples indicated that Lijiaqiao, Dashanzhen, and Liaocheng City were determined to be at a low risk level, while Weiwan was determined to be at a high risk level. The sources of PAHs were evaluated by employing ratios of the characteristic molecular markers, indicating that the combustion of fossil fuels and biomass could be the possible sources of PAHs.