Advanced Materials Research Vols. 1092-1093

Abstract: The rich phosphorus resources in Xiangxi river watershed had a serious impact on water quality of Xiangxi River. The phosphate ore region distributed in this area was selected as studying area, and the activities of different soil enzymes in 0-20cm and 20-40cm soil layers in mining zone (MZ), transportation zone (TZ) and hydro-fluctuation zone (HFZ) were respectively measured. Meanwhile, the differences of enzymes in the two soil layers between different regions were analyzed. The main results were as follows: The activity of soil polyphenol oxidase decreased in the order of MZ> TZ > HFZ, while the activities of soil catalase, sucrase, urease and alkaline phosphatase were higher in TZ and lower in MZ; Except the activity of soil invertase, the activities of other enzymes in 20-40 cm soil layer were mainly higher than those in 0-20 cm soil layer; The activities of soil enzymes in different regions of XXR watershed had significant differences with each other and were mainly correlated with soil pH, OM and TN; Soil enzymes such as catalase, polyphenol oxidase, invertase, urease and alkaline phosphatase are sensitive to the environmental conditions around the soil, and they could be used as effective indicators reflecting the soil quality in mineral regions.

Abstract: Based on TM remote sensing image and topographic map, the spatial information of landscape pattern was extracted in study areas in 1990, 2000 and 2010. With the principles and methods of landscape ecology, land use/cover change, ecosystem service values were selected to construct the ecological safety index which was used to quantitatively analyze the dynamic changes of landscape pattern and elucidated ecological safety status in study area. Result showed that During the 20 years from 1990 to 2010, as human factors interference increase, the farmland and construction land increased by 21.11% and 15.38% respectively, the grassland area is reduced by 27.57%.Cropland had an increased trend during the period of 1990 to 2010 period, The wood land and swamp land had an increased trend during the period of 1990 to 2000 area also, but reduced during from 2000 to 2010.From 1990 to 2010, the whole study area lied in the level of relatively safer, but the safe area was reduced the amount of 4967 ha during 2000 to 2010. The relatively safer land areas was increased first then reduced during the whole study period, the relatively non-safer level land and relatively safer level land areas were accounting for 10.81% and 2.92% of the total area respectively.

Abstract: The temporal impact characteristics of soil physical and chemical properties and plants characteristic had been revealed by investigation and sampling of multi-phase soil and plants sample in subsidence area and control area. Through the research, it could study the effect of surface ecological environment caused by coal mining, and further propose the corresponding countermeasures of management and restoration. Evolution characteristic of soil physical properties is that soil water content, bulk density and porosity made a response to mining subsidence, and soil moisture content variation was much more obvious and affected by seasonal weather. Evolution characteristic of soil chemical properties is that soil nitrogen and available phosphorus had decreased due to coal mining subsidence, expect pH, organic matter and available potassium. However, the impact degree of subsidence was relative slight and had “partition” feature, showing a trend of DSR>CUSR& RUSR. Moreover, the response time node of subsidence was different from physical properties with a certain lag, which usually occurred in alternating hot and humid periods. All the affected indexes of chemical properties did not recover to initial level before mining in one year. Based on above studies, a new “partition” differentiated ecological restoration model had been proposed for the first time. For the CUSR and RUSR should followed “natural closure” model, conversely, the DSR should selected “marginal fissures filling & vegetation optimization & rhizosphere environment improvement” of artificial induction model, which giving priority to ecological self-healing with supplementing appropriate human interventions.

Abstract: According to the relevant specification and the actual survey results, this paper selects 14 evaluation indexes from the mine geological disasters, the destruction of landform landscape, aquifer breakdown and land resource utilization destroyed in four aspects, and then application of the Analytic Hierarchy Process (AHP) to quantify the weight of each index values, establish comprehensive evaluation mathematical model of the weighted scores based on Analytic Hierarchy Process. And applying the method to the eighth mine of Ann pingdingshan coal Co., LTD, the result of evaluation and the fact are identical, the evaluation method is reasonable and feasible.

Abstract: Tailing is one kind of solid waste produced in mining activities. It has seriously impacted the ecological environment and the effect will last in a long period. This paper reviews some effects of tailings on surrounding rivers, surface and ground water, soil, plants and sediments.

Abstract: Plants Configuring can improve environmental quality, it has air purification, landscaping, maintenance of ecological balance and the promotion of the role of city-dwellers and other aspects of physical and mental health of more and more eager to return to the natural ecology of attention, study the ecological role of garden plants have become one of the hot issues of the world. This paper explored the impact Garden Plants air dynamic microbial community structure, and antibacterial effect differences between plants. To reveal the richness of different garden plants and provide scientific material in terms of the role of clean air, to provide a scientific basis for landscape design landscape designer.

Abstract: This paper analysis ecological environment characteristic of Resources County base on the delimited target of ecological protection red line, build a indicator system of ecological protection red line from the forbidden development zones, key eco-function zones, important eco-function zones and priority biodiversity zones, and determine the delimited technology method of ecological protection red line. Such as, finish the delimited of type-I and type-II red line and definite the protection emphasis and direction of ecological protection in red line zones.

Abstract: In order to understand the situation of red-crowned Crane habitat, analysis eight main sectors which include vegetation type, vegetation coverage, altitude, slope, aspect, water, residential and road affecting Red-crowned inhabitation, through combining the Remote Sensing (RS) and Geographic Information System (GIS) technology with RS images and basic geographic information, without concerning the food factor. The research obtains the result that red-crowned Crane distributed point both in suitable area and sub suitable area can reach 92.07% consistent with the actual situation through fuzzy comprehensive evaluation and analytic hierarchy process (AHP) to acquire the weight and ranking to build evaluation model.

Abstract: In this paper, the water environmental carrying capacity (WECC) was quantitatively analyzed considering the comprehensive effect of economy, society, resources, environment, and technology in Jiaozhou, Shandong province. An evaluation index system was established and applied in the evaluation of WECC in Jiaozhou from 2007 to 2011 with analytic hierarchy process (AHP) and vector modulus method. The results indicated that the WECC index was at low level in the range of 0.061-0.080 with the decreasing trend firstly but then increasing trend gradually, which shows that the water resources shortage is becoming the key factor restricting the development of Jiaozhou. The results conform to the real condition of Jiaozhou and the research provides the scientific methods and suggestions for the coordinated development of social economy and water environment protection.

Abstract: This study proposed the theory of water value balance and built the dynamic model system, based on the water value balance index. To solve dynamic weight issues, the entropy weight model was used, while the gray forecasting model was used for supplement missing data. Simulation platform integrates mathematical module, simulation module, property database and spatial database of urban water system in Harbin, which based on Matlab, C#, CloudSim, Oracle, ArcGIS and its secondary development technology. The results showed that urban water systems had a strong capacity to utilize water to capture value between May and mid-September, the value obtained was not sufficient to compensate the loss caused in the periods from January to April and from late September to December. The loss of water due to unknown causes was close to 7%, while the cost of water quality restoration accounted for 0.89% of GDP.