Degradation of cultivated bench terraces in the Three Gorges Area: Field mapping and data mining

Application of a new combined fractionation technique (CFT) to detect fluorophores in size-fractionated hydrophobic acid of DOM as indicators of urban pollution.

Significant number of accidental water pollution incidents occurred during the past decades in China, often having transboundary impacts, including the high profile Songhua River toxic chemical spill in November 2005, and drinking water source pollution by algae in the Tai Lake, Wuxi in May 2007. Over half of all river sections monitored for water quality are rated as being unsafe for human contact, and this pollution is estimated to cost several per cent of GDP. If not immediately and effectively controlled, pollution incidents caused by accidental releases or cumulative pollution can worsen water shortages and scarcity problems. The environmental pollution accidents can cause great danger, and there are many potential pollution sources. From the Comparison with the advanced and mature experience by system, mechanism, the article expounds some ideas to improve and strengthen emergency disposal and prevention system for water pollution accidents. It identifies areas for improvement and presents policy recommendations for institutional reform, improving regulations; and strengthening the implementing capacity to maximize the use of existing institutions, regulations and other management resources.

Water Pollution Emergencies in China: Actualities, Prevention and Response

Putting the user in charge of their online identity is a necessary precondition for privacy on the web. This requires the ability to manage identifying information that remote parties store in data repositories on the user's device. We performed a crawl of thousands of popular websites with the intention of assessing the prevalence of various problematic patterns of client-side data storage. The focus of this paper is on techniques that make use of the browser cache, especially when they impede active identity management by the user. From these results, we derive a novel privacy-enhancing policy for client-side data storage - self-destructing identifiers - improving the current defacto standard. This policy has already seen some adoption in practice in the form of a Firefox add-on that we developed as a proof of concept.

Zombie-cookies: Case studies and mitigation

The present paper aims to introduce the authors' research on the approach to optimum distribution of the limited water resources in the urban areas by taking Tangshan as a case study.Based on the different grades of water quality and water resources,this paper has studied the decision-making variable's restrained conditions and applied multi-purposed optimization formula in distributing the city's limited water resources to mitigate the contradictions and conflicts between water supply and demand and ensure its harmonious development.The socalled multi-purposed water-distribution optimization means the greatest benefit to be brought to the water consumers,including those of industrial and agricultural development,household-living and the eco-environment protection,etc.It is well known that the existing limited water resources are not enough to satisfy their demands.Carefully studying the goal-attaining function of Matlab toolbox and applying different optimum scenarios,this paper has analyzed and put forward different optimization scenarios in accordance with their objective needs,so as to promote the harmony and sustainable development of our society,eco-environment,and the national economy by taking Tangshan city as a sample.And,finally,the paper has given further discussion on more details on the proper distribution problem.

On application of optimum urban water resources distribution method in the case for Tangshan City

Safe and reliable drinking water is vital to every community. But Water pollution incidents have taken place in China frequently resulting in an enormous economic loss. How to solve the problem becomes a significant issue to scrub the deleterious effects of pollution accidents. So the establishment of response models of water pollution accidents in Wuhan city is necessary in order to enhance rapidity, effectiveness and accuracy of emergency commanding, and to improve the level of scientific decision-making. As Emergency pollution management system is a complete system composed of data layer, model layer, the system interface layer and network layer. It also has early warning functions such as the real-time monitoring of water quality and water quality prediction of water pollution accidents. Early Warning and Emergency Response system for Water Pollution Accidents in Wuhan City, China shows a quick-acting and accurate numerical method to calculate the value of pollutant concentration in a short time.

Early Warning and Emergency Response System for Water Pollution Accidents in Wuhan City, China

Water pollution incidents have taken place in China frequently resulting in an enormous economic loss. How to solve the problem timely, effectively and efficiently becomes a significant issue to scrub the deleterious effects of sudden pollution accidents. Emergency pollution incident management system is a complete system composed of data layer, model layer and the system interface layer. It has early warning functions such as the real-time monitoring of water quality and prediction of pollution emergencies. To take Wuhan city for example, this system realize the function of attribute query, mouse fixed-point tracking, input of incidents site and output of transportation process as well as extension of pollutants cluster from time to time. It can also query the water quality in different time. The system can be enhanced profoundly and will shorten the response time in a large scale. The successful control methods provide references and technical support for watershed management of pollution accidents in other area.

The Construction for Guarantee and Ability of Early Warning and Response of Water Pollution Emergencies in Wuhan City, China

A risk assessment for water shortage is constructed to analyze the carrying capacity of water resources in Sheshui River watershed, China It is based on the information of present economic development There are several serious environmental problems which might cripple the development potential in Sheshui River watershed Risk assessment results are used to analyze the carrying capacity of water resources from an ecological angle in Sheshui River watershed It is found that water shortages in this area are not related to types of water source, but can be classified in terms of water quality and conservation The authors analyse changes in the carrying capacity of water resources under the conditions of future water management policies The result indicates that carrying capacity of water resources in Sheshui River watershed can only be effectively improved by efficient use of water and water conservation schemes, as well as long-term investment in environmental protection

Notice of Retraction Analysis of the carrying capacity of water resources in Sheshui River watershed, China

Watershed, as it comprehensively represents any part of water resource on our land, is considered the most appropriate units not only for the assessment of water environment, analysis and usage of water resources, but also for the management of water quality. Therefore, many scholars use watershed management to deal with the arising water problems and maintain sustainable development at watershed scale. Considering the complication and uncertainty of watershed system, previous scholars began to use various newly-built models to fulfill the task of watershed management, that is, the multi-objective optimization watershed management models. These models enable us to view watershed management from environmental, economical and social aspects. Base on the study of these models, this paper comprehensively concludes the mechanics, feature and methods of the models. Especially, we analysis four applications of multi-objective optimization models in watershed management. Finally, we analysis the problems of the existing models and express our expectation of the development of multi-objective optimization watershed management models in the future.

Application of Multi-objective Optimization Models of Watershed Management

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 by crops. In addition, it has been found that both topography and meteorological systems result in the features. In order to exploit the climatic resource, some crops for the different heat zones are recommended with the criterions such as under suitable climate condition, high economic value and great market demand. The results suggest that: 1. Below the sea level elevation 500m is suitable for citrus and tung oil tree. 2. Tea tree and mason pine could be planted between 500m and 800m. 3. Mushroom and Chinese chestnut are suitable for the elevation 800m-1200m. 4. The land above 1200m can be used for forage grass and Chinese medicinal materials. Finally, the hazard of climatic resource utilization and development in this region has also been evaluated in this paper.

Xuying Yuan

Papers

Early Warning and Emergency Response System for Water Pollution Accidents in Wuhan City, China

The Construction for Guarantee and Ability of Early Warning and Response of Water Pollution Emergencies in Wuhan City, China

Notice of Retraction Analysis of the carrying capacity of water resources in Sheshui River watershed, China

Application of Multi-objective Optimization Models of Watershed Management

Analysis and Utilization of the Climatic Resources in Xiangxi River Basin