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941.
比较了胶布热空气连续硫化废气的几种处理方法,认为焚烧法是最有效的处理方法,并对应用该法处理废气的工艺原理、主要设备、余热回收是焚烧过程中诮注意的事项作了较详尽的阐述。 相似文献
942.
将含有大量悬浮物的洗气箱废水进行初级沉降后,约3/4的废水返回洗气箱用作洗涤水,其余的与洗气塔废水混合进地沉降池去除悬浮物,上清液送至生物滤池进行生化处理去除含氰人合物其他有机物。生化出水经絮凝、澄清后回用于洗气箱和洗气塔实现了废水闭路循环。他 相似文献
943.
电解法处理高含硫气田水 总被引:1,自引:0,他引:1
本文详细介绍了川南矿区含硫气田水电解法处理的试验情况,用自己研制的电解反应器对电解时间、pH值、电流密度等工艺条件进行了考察,提出了电解法处理含S~(2-)200mg/L的气田水的最佳工艺条件。试验结果表明:该方法是成功的,它可以使气田水中硫化物的脱除率达99%以上,达到国家排放标准(GB8978—88:S~(2-)<5mg/L)。该方法的主要特点是投加处理药剂少,操作简便,设备小型,占地面积小,特别适用于产水量不大的井站使用。 相似文献
944.
Steve A. Mizell Richard H. French 《Journal of the American Water Resources Association》1995,31(3):447-461
ABSTRACT: Historically ephemeral washes in the Las Vegas Valley have become perennial streams in the urbanized area, and the primary source of these perennial flows appears to be the overirrigation of ornamental landscaping and turf. Overirrigation produces direct runoff to the washes via the streets and results in high ground water levels in some areas. Elevated ground water levels result in discharge to the washes because of changes in the natural balance of the hydrologic system and construction site and foundation dewatering. In recognition of the resource potential of these flows within the Las Vegas Valley, of the potential for dry weather flows to convey pollutants from the Valley to Lake Mead, and of the need to characterize dry weather flows under the stormwater discharge permit program, the quantity and quality of dry weather flow in Flamingo Wash was investigated during the period September 1990 through May 1993. This paper focuses on the resource potential of the flow (quantity and quality) as it relates to the interception and use of this water within the Valley. Economic and legal issues associated with the interception and use of this resource are not considered here. 相似文献
945.
Catherine Denault Robert G. Millar Barbara J. Lence 《Journal of the American Water Resources Association》2006,42(3):685-697
ABSTRACT: Stationarity of rainfall statistical parameters is a fundamental assumption in hydraulic infrastructure design that may not be valid in an era of changing climate. This study develops a framework for examining the potential impacts of future increases in short duration rainfall intensity on urban infrastructure and natural ecosystems of small watersheds and demonstrates this approach for the Mission/Wagg Creek watershed in British Columbia, Canada. Nonstationarities in rainfall records are first analyzed with linear regression analysis, and the detected trends are extrapolated to build potential future rainfall scenarios. The Storm Water Management Model (SWMM) is used to analyze the effects of increased rainfall intensity on design peak flows and to assess future drainage infrastructure capacity according to the derived scenarios. While the framework provided herein may be modified for cases in which more complex distributions for rainfall intensity are needed and more sophisticated stormwater management models are available, linear regressions and SWMM are commonly used in practice and are applicable for the Mission/Wagg Creek watershed. Potential future impacts on stream health are assessed using methods based on equivalent total impervious area. In terms of impacts on the drainage infrastructure, the results of this study indicate that increases in short duration rainfall intensity may be expected in the future but that they would not create severe impacts in the Mission/Wagg Creek system. The equivalent levels of imperviousness, however, suggest that the impacts on stream health could be far more damaging. 相似文献
946.
ABSTRACT: Flash flooding is the rapid flooding of low lying areas caused by the stormwater of intense rainfall associated with thunderstorms. Flash flooding occurs in many urban areas with relatively flat terrain and can result in severe property damage as well as the loss of lives. In this paper, an integrated one‐dimensional (1‐D) and two‐dimensional (2‐D) hydraulic simulation model has been established to simulate stormwater flooding processes in urban areas. With rainfall input, the model simulates 2‐D overland flow and 1‐D flow in underground stormwater pipes and drainage channels. Drainage channels are treated as special flow paths and arranged along one or more sides of a 2‐D computational grid. By using irregular computation grids, the model simulates unsteady flooding and drying processes over urban areas with complex drainage systems. The model results can provide spatial flood risk information (e.g., water depth, inundation time and flow velocity during flooding). The model was applied to the City of Beaumont, Texas, and validated with the recorded rainfall and runoff data from Tropical Storm Allison with good agreement. 相似文献
947.
Lorenz King 《中国减灾(英文版)》2002,(3)
20 0 0wasarelativelynormalyearintermsofglobaldisasterevents.Thegloballossfromnaturaldisasterswasapproximately 30billionUSD ,whereasthatinanyofthepreviousyearshadexceeded 1 0 0billionUSD .Theinsurancelossin 2 0 0 0wasonly 8.3billionUSD ,with 92 0 0 personskilled .Therewasn… 相似文献
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