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Zhang L.,Jiangxi Provincial Water Conservancy Planning and Designing Institute
Lecture Notes in Electrical Engineering | Year: 2013

With the rapid development of information construction, the project design to rely on traditional video conferencing, conference calls, e-mail between joint trials cannot meet the needs of people to communicate. This chapter describes the presentation of this new technology of remote visualization for plan approval system and operating practices fully comply with the approval needs of the design process in the drawings, the real feasible project design industry's high-tech plan approval mode, give water conservancy the design of communication of the design industry to bring new changes. © 2013 Springer-Verlag Berlin Heidelberg.

Luo W.,Wuhan University | Luo W.,Jiangxi Provincial Water Conservancy Planning and Designing Institute | Zhang X.,Wuhan University | Deng Z.,Wuhan University | Xiao Y.,Wuhan University
Yingyong Jichu yu Gongcheng Kexue Xuebao/Journal of Basic Science and Engineering | Year: 2013

In recent years, the low water level in Poyang Lake appeared earlier and lasted longer than before, and it continued to break the recorded historic lowest value, which caused the disadvantageous influence on the health of the wetland ecological system in Poyang lake. The total runoff into Poyang Lake is closely related with the water level change and drought-flood alternation, so the study on the variation and periodic law of the total runoff into Poyang Lake plays an important role in the protection of ecological system in Poyang Lake basin. Based on the daily time series of the total runoff into Poyang Lake from 1959 to 2009, the variation trends of the total runoff into Poyang Lake was analyzed by the linear regression analysis, the methods of the Mann-Kendall and the moving average. The results show that the annually total runoff into Poyang Lake has a non-significant upward trend. The wavelet analysis shows that there is the first main 19-yearly period in the annually total runoff time series. And the seasonally total runoff time series, divided into four seasonal time intervals, Jan to Mar, Apr to Jun, Jul to Sep and Oct to Dec, have several main time scales of periods with 31, 19, 17 and 14-yearly main periods. It is concluded that the 19-yearly main period of the annually total runoff time series is determined by the combination of the main periods of the four seasonally total runoff time series. Based on the analysis of the variation of the total runoff into Poyang Lake, the drought-flood abrupt alternation was analyzed by using the Long-cycle Drought-Flood Abrupt Alternation Index(LDFAI). The results show that the alternating cycle from drought to flood and from flood to drought exists between Apr to May and Jun to Jul in the long term. And into 21st century, the interval from drought to flood and from flood to drought is becoming shorter and shorter, which means the oscillation of the alternation of drought-flood is intensified.

Wang Z.,Central South University | Chai L.,Central South University | Wang Y.,Central South University | Yang Z.,Central South University | And 2 more authors.
Environmental Monitoring and Assessment | Year: 2011

As part of our efforts to find effective methods to the drinking water risk management, the health risk assessment of arsenic and cadmium in groundwater near Xiangjiang River was analyzed. The results suggest that although the arsenic and cadmium concentrations in 97% of groundwater sources are less than the requirement of Water Quality Standards for Drinking Water (GB5749-2006) in China, the residents served by almost all of the investigated centralized drinking water sources have a significant potential health risk by consumption, especially cancer risk. It is justified through analyses that risk assessment is an effective tool for risk management, and the maximum permissible concentration of arsenic and cadmium in drinking water (0.01 and 0.005 mg L -1, respectively) is suitable for China at present, considering the current economic status of China. Risk managers develop cleanup standards designed to protect against all possible adverse effects, which should take into account highly exposed individuals, effects of mixtures of toxic substances, attendant uncertainties, and other factors such as site-specific (or generic) criteria, technical feasibility, cost-benefit analyses, and sociopolitical concerns. © 2010 Springer Science+Business Media B.V.

Chen J.-Q.,Central South University | Wang Z.-X.,Central South University | Wu X.,Jiangxi Provincial Water Conservancy Planning and Designing Institute | Zhu J.-J.,Central South University | Zhou W.-B.,Central South University
Transactions of Nonferrous Metals Society of China (English Edition) | Year: 2011

A total of 153 soil samples were collected from Changsha City, China, to analyze the contents of As, Cd, Cr, Cu, Hg, Mn, Ni, Pb and Zn. A combination of sampling data, multivariate statistical method, geostatistical analysis, direct exposure method and triangulated irregular network (TIN) model was successfully employed to discriminate sources, simulate spatial distributions and evaluate children's health risks of heavy metals in soils. The results show that not all sites in Changsha city may be suitable for living without remediation. About 9.0 of the study area provided a hazard index (HI)>1.0, and 1.9 had an HI>2.0. Most high HIs were located in the southern and western areas. The element of arsenic and the pathway of soil ingestion were the largest contribution to potential health risks for children. This study indicates that we should attach great importance to the direct soil heavy metals exposure for children's health. © 2011 The Nonferrous Metals Society of China.

Wu X.,Jiangxi Provincial Water Conservancy Planning and Designing Institute | Wang Z.,South China Institute of Environmental Sciences | Zhou H.,Jiangxi Provincial Water Conservancy Planning and Designing Institute
Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | Year: 2013

Digital wetland construction plays meaningful function for wetland resources information sharing, wetland environment protection and degraded wetland restoration. Evolutional process, degenerated mechanism and main dynamics of the Poyang Lake wetland were systematically analyzed using multi-temporal and long-time dynamic monitoring interpretation, spatial analysis and decision support technology. Then, the actualities of wetland evolvements affected by integrated physical and anthropic factors such as, land desertification, soil erosion, frequent droughts, increased water pollution, plummeted biological resources, and severely serious degradation were analyzed. In addition, several aspects in the wetland evolving process were discussed, such as, guide of macroscopic policy, interaction among population, resources and enciroment, coupling of climate, ecology and hydrology social and economic factors. Finally, coordinating digital wetland regulation systems such as wetland and watershed system, internal system and social-economy system were constructed.

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