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Seasonal characteristics of the total nitrogen TN), total phosphorus (TP) and other factors in the sediment and water in the Yuyuantan Lake were analyzed. Correlation among all forms of P was estimated considering the seasonal variations of TP. The result showed that the concentrations of TN and TP are lower in summer and higher in autumn. All nutritional indexes are much higher in the west of lake...
The contents and characteristics of ten heavy metals in surface sediments from Yangzonghai Lake in Yunnan, China were analyzed. Ecological risk index presented by Håkanson to assess the potential ecological risk of Yangzonghai Lake was utilized. The results showed that the average concentrations of titanium(Ti), manganese(Mn), zinc(Zn), vanadium(V), chromium(Cr), copper(Cu), nickel(Ni), cobalt(Co),...
Invasive polycheate tubeworms of the reef-building species Ficopomatus enigmatus have taken advantage of reduced water levels and increasing salinities since 2007 to become established in the Lower Murray Lakes of the South Australia. Methods to remotely detect and map reef formations using digital aerial imagery in a contextual approach utilizing both image analysis and GIS processing with bathymetric...
The papers depict application of Rapid Impact Assessment Matrix (RIAM), in evaluating the impacts of construction of new marina and enhance the beaching area. In order to have an integrated approach for the impact assessment, the methodology of RIAM was used. RIAM is ideally suited to all EIA where a multi-disciplinary team approach is used, as it allows for data from different sectors to be analyzed...
Ten sites along the XiJiang River (WuZhou section), China were sampled to evaluate the copper (Cu), Zinc (Zn), lead (Pb), cadmium (Cd), and chromium (Cr) concentrations in sediments. The order of total metal concentrations in sediment samples was found to be Zn>Cu>Cr>Pb>Cd. The approach of Hakanson potential ecological risk index was used for the ecological risk assessment. Compared to...
Cumulative impacts of productive enterprises are an increasingly serious problem in coastal areas. By analyzing the industrial structure during the last few decades in Dalian, China, we conclude there are five main sources of cumulative impacts: industrial enterprises, domestic sewage, agriculture, coastal engineering and marine aquaculture. According to the cumulative ecological effect causation...
With the rapid advances in on-line observing system applications, the paradigm in environmental modelling is shifting from one-off models for specific purposes, to operational models, sequentially assimilating data streams from in situ and remote sensors. Such models can provide products and services to support a wide range of applications, from short-term forecasting to long-term scenarios, and are...
In order to assess the effect of environmental restoration plans for a small scale beach called Heda-Mihama, simulation-based habitat evaluation approach is employed. A three-dimensional hydrodynamic model is developed by using the measured topography to reproduce the characteristics of currents around Heda-Mihama. A sediment transport model is also developed to predict the distribution and change...
Pond is an ideal study target which can be regarded as an enclosed ecosystem with little external disturbance such as pollution discharge. The aim of the study is to obtain further understandings of freshwater eutrophication mechanism through a one-year's intensive observation and monitoring program for a shallow pond in Chongming Island, China. The result showed that NO3-N, PO4-P and DTP kept in...
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