NUTRIENT LOAD ESTIMATION METHODS FOR RIVERS   总被引：2，自引：0，他引：2  

Huai-en LI. Joseph Hun-Wei LEE  Ming CM Professor  Environmental Science Institute  Xi''''an University of Technology. Xi''''an . Shaanxi  P.R. China.Professor  Department of Civil Engineering  The University of Hong Kong  Pokfulam Road  Hong Kong.P.R. China  Ph.D. student in Hydrology  Water Resources. Environmental Science Institute  Xi''''an University ofTechnology  Xi''''an  Shaanxi  P.R. China 《国际泥沙研究》2003,18(4)

Pollutant load estimation is essential for watershed management and water pollution control. For most watersheds, only sparse water quality measurements (e.g. monthly data) are available. The influence of input data on the accuracy of non-point source pollution load estimation is studied using the water quality and stream flow data from a small watershed in Hong Kong. Comparison and analysis of the results using 8 different methods show that the accuracy of stream-flow runoff is the single most important factor for the calculation of pollutant load. Based on the results, the stream flow correction coefficient is advanced to provide a more reliable load estimation. The improved method of pollutant load estimation can be easily applied in practice since the stream-flow runoff can be measured by hydrological station or estimated with various hydrological methods.  相似文献   

青海省土地资源人口承载量系统动力学研究   总被引：15，自引：0，他引：15  

杨晓鹏  张志良 《地理科学》1993,13(1):69-77

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南半球的全新世海平面波动     

Isla  FI 张志良 《国外第四纪地质》1990,(4):37-46

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以色列卡尔梅勤北部海岸全新世海平面变化—根据淹没的考古遗址资料     

Galil.  E  张志良 《国外第四纪地质》1989,(4):21-25

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西澳大利亚太古宙科马提岩中镍硫化物矿石组合变化的地球化学和流…     

Lesh.  CM 杨丽清 《地质地球化学》1994,(3):34-42

地层学、火山学、岩石学和流体动力学的研究结果表明，西澳大利亚与太古宙科马提岩有关的镍硫化物矿床是由于通道化熔岩流之下固结硫化物沉积物遭受热侵蚀作用而形成的。坎博尔达地区的地球化学和Ｎｄ同位素数据表明，矿化的熔岩通道所受的混染都比该岩流的周边无矿部分要轻，这是由于通道内排泄速率高和得到连续不断的补给所致。这种解释对硫化物的定位模式、它们与主岩科马提岩的平衡程度和硫化物矿石的成分有以下几种含意：１）科  相似文献   

冲击压实技术在上海浦东机场跑道浅层地基处理中的试验应用     

张志良  黄沅平 《探矿工程》2007,34(12):28-31,35

总结了上海浦东机场二期飞行区3种不同组合的冲击碾压试验——冲击碾压联合高真空排水、冲击碾压联合塑料排水板、冲击碾压，试验结果表明，冲击碾压联合高真守排水方法压实效果最为显著，并在二期飞行区浅层地基处理实践中得到应用。  相似文献   

Cellular diagnostics and coral health: declining coral health in the Florida Keys     

Downs CA  Fauth JE  Robinson CE  Curry R  Lanzendorf B  Halas JC  Halas J  Woodley CM 《Marine pollution bulletin》2005,51(5-7):558-569

Coral reefs within the Florida Keys are disappearing at an alarming rate. Coral cover in the Florida Keys National Marine Sanctuary declined by 38% from 1996 to 2000. In 2000, populations of Montastraea annularis at four sites near Molasses Reef within the Florida Keys National Marine Sanctuary and one reef within Biscayne National Park were sampled on a quarterly basis. Anecdotal observations showed corals at Alina's Reef in Biscayne National Park appeared healthy in March, but experienced an acute loss of coral cover by August. Cellular Diagnostic analysis indicated that Alina's Reef corals were in distress: they had been afflicted with a severe oxidative damaging and protein-denaturing stress that affected both the corals and their symbiotic zooxanthellae. This condition was associated with a significant xenobiotic detoxification response in both species, reflecting probable chemical contaminant exposure. These results demonstrate that applying a Cellular Diagnostic approach can be effective in helping to identify stress and its underlying causes, providing diagnostic and prognostic biomarkers of coral health.  相似文献   

Evaluating Oregon's beach sites for application to United States Environmental Protection Agency's BEACH Act criteria     

Benedict RT  Neumann CM 《Marine pollution bulletin》2004,49(7-8):630-636

With the passage of the Beaches Environmental Assessment and Coastal Health (BEACH) Act in 2000, coastal states were mandated to assess and sample coastal recreational waters for bacterial ambient water quality parameters. The assessment of beach sites required the application of federal guidelines and a tiered approach to delineating the beaches. Eighty-seven beach sites in Oregon were evaluated and ranked by use, available information, pollution threats, sanitary survey and monitoring data results, exposure considerations, and economic/development factors. This ranking resulted in 19 high priority beaches (tier 1), five medium priority beaches (tier 2), 23 low priority beaches, and 40 beaches with a rank of none in Oregon.  相似文献   

Organotin contamination in the mussel Mytilus galloprovincialis from Portuguese coastal waters     

Barroso CM  Mendo S  Moreira MH 《Marine pollution bulletin》2004,48(11-12):1149-1153

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Toxicopathic liver lesions in English sole and chemical contaminant exposure in Vancouver Harbour,Canada     

Stehr CM  Myers MS  Johnson LL  Spencer S  Stein JE 《Marine environmental research》2004,57(1-2):55-74

The prevalence of toxicopathic liver lesions in English sole (Pleuronectes vetulus) was determined along a presumed gradient of chemical contamination in Vancouver Harbour, Canada. Fish were captured from five sites in or near Vancouver Harbour, British Columbia, Canada. No toxicopathic lesions were observed in fish examined at the reference site (Howe Sound outside Vancouver Harbour), or at the outer harbour site. In contrast, 20-23% of the fish from three sites located in the central harbour, Indian Arm and Port Moody Arm had one or more types of toxicopathic lesions. Likewise, aromatic hydrocarbon (AH) metabolites measured in bile exhibited a gradient in levels from lower concentrations at the reference site to significantly higher levels in fish from Indian Arm and Port Moody Arm harbour sites. The occurrence of toxicopathic liver lesions was statistically associated with concentrations of AHs measured in sediment and AH metabolite levels measured in bile.  相似文献