Yijin Wu

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

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.

The Construction for Guarantee and Ability of Early Warning and Response of Water Pollution Emergencies 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.

Analysis and Utilization of the Climatic Resources in Xiangxi River Basin

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.

Application of Multi-objective Optimization Models of Watershed Management

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.

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