共查询到20条相似文献,搜索用时 140 毫秒
1.
从土粒作用的角度形象地对软土处理的常用方法原理进行了分析,并按照原理的不同相应将处理方法分为4类:固结处理、固化处理、局部强化和水平连接,并详细介绍了近期开发的轻质土处理方法;为各处理方法提供了一个近期工程实例。 相似文献
2.
对城镇污水处理厂污泥处理处置技术路线选择的思考 总被引:2,自引:0,他引:2
分析了当前我国城镇污水处理厂污泥处理处置存在的问题和原因,详细介绍了处理和处置的关系、不同处置方式的基本要求和各类处理手段的作用。提出了按照处置决定处理,处理满足处置,处置方式多样,处理适当集约的思路选择污泥处理处置技术路线的相关建议。 相似文献
3.
4.
对小型水利工程隧洞塌方原因进行了分析,并对塌方预防和处理措施作了较为详细论述。针对隧洞施工中发生的一般塌方处理、尤其大塌方问题,提出了"超前临时支护法"施工处理措施,且对该施工处理技术进行了分析总结。 相似文献
5.
6.
7.
8.
9.
评价了农业排水的纳滤膜处理系统工艺参数、处理水质及各种费用成本。并进行了技术经济分析 ,讨论了膜法处理农业排水的可行性 ,提出了一些建议。 相似文献
10.
11.
Durga Rao H. V. Korada 《Water Resources Management》2014,28(3):731-747
Uneven distribution of domestic water in space and time is a major concern in many fast growing cities due to improper planning and lack of scientific approach. This problem is much severe where the maximum domestic water requirements are met from the groundwater resources. Optimising a single groundwater pumping scheme may be an easy task using simple linear programming technique but, if the number of pumping schemes and constraints are more, solutions for identifying such groundwater schemes are more difficult and laborious using conventional methods as the constraints varies in space and time. In this paper, a new technique was developed to identify new groundwater pumping schemes to meet the present and future domestic water requirements in space and time by integrating spatial optimisation technique with the groundwater model. The approach considers the possible optimum rate of groundwater pumping, minimising the cost of water supply scheme and having minimum impact on the downstream side groundwater table using high resolution satellite data (IKONOS), Geographical Information System (GIS) tools and optimisation techniques. Dehradun, which is one of the fast growing cities in India, was considered as a study area to demonstrate the proposed new technique. Domestic water demand for next two decades (up to 2,031) was forecasted and compared with the existing supplies. Nearly 48 additional groundwater pumping schemes were identified to cater the present and future demands. Its impact on the groundwater table was also studied using groundwater modelling technique. 相似文献
12.
13.
基于层次分析法的水源地上游农村生活污水处理技术综合性能评价 总被引:1,自引:0,他引:1
通过分析影响农村生活污水处理技术综合性能的相关因素,应用层次分析法(AHP)建立了包含1个目标层、3个准则层和12项指标的水源地上游农村生活污水处理技术综合性能评价指标体系,并确定了各指标权重。对水源地上游8类农村生活污水处理技术性能进行综合评价的结果表明,采用组合工艺的处理技术综合性能优于采用单项工艺的技术;小型一体化污水处理装置、土地处理系统、小型人工湿地的综合性能优于生物接触氧化池、净化沼气池和稳定塘。生物+生态组合工艺处理技术比较适合于水源地上游农村生活污水处理应用。针对特定地区,可参考基于层次分析法的技术综合性能评价结果,并综合考虑当地自然、经济和社会条件等因素,因地制宜选择先进适用的农村生活污水处理技术。 相似文献
14.
15.
用水量预测对区域水资源规划、利用和管理提供重要依据.运用灰色关联度分析法分析包头市市区居民生活用水量影响因素的基础上,分别建立多元线性回归模型、灰色GM(1,1)模型及灰色线性组合模型对该地区2009年和2010年的生活用水量进行预测分析,同时比较了三个模型的预测精度.结果表明:城市居民生活用水量与城市用水人口、人均居住面积和水价的关联度较高;2009年和2010年用水量的预测采用组合灰色模型精度最高,相对误差分别为13.6%%和6.5%,均方根相对误差为10.7%.组合预测模型的预测精度明显优于单一模型,使结果更加准确、合理,符合实际情况. 相似文献
16.
韩忠 《水资源开发与管理》2022,(2)
农村生活污水治理是改善农村水环境的重要内容,农村生活污水处理项目建设及运行管理中存在的问题,直接影响着农村生活污水治理设施效果的发挥。本文分析了农村生活污水排放的特点以及施工运行过程中存在的问题,据此提出了在设计、施工质量和运行维护管理等方面的改进措施,提高了农村污水处理项目的建设和管理水平,充分发挥了治理设施的作用,改善了农村水环境,可为农村生活污水治理提供参考。 相似文献
17.
A Financial,Environmental and Social Evaluation of Domestic Water Management Options in the West Bank,Palestine 总被引:2,自引:2,他引:0
Dima W. Nazer Maarten A. Siebel Pieter Van der Zaag Ziad Mimi Huub J. Gijzen 《Water Resources Management》2010,24(15):4445-4467
Water is one of the most valuable natural resources in the West Bank, Palestine. Due to its limited availability, it is a
resource that needs particular protection. Although agriculture consumes most of the water (70%) in the West Bank, the domestic
water supply is strategically not less important. It is the aim of this study to evaluate domestic water management options
suitable for Palestinian conditions that contribute to achieving water sufficiency in the domestic water use in the house of tomorrow. A number of options were evaluated economically, environmentally and socially using the concept of life cycle impact assessment
(LCIA). Results of the study showed that by introducing a combination of domestic water management options, a substantial
decrease in the water consumption of more than 50% can be achieved, thereby reducing the pressure on the scarce water resources.
The annual environmental impact of the in-house water use can be reduced in the range of 8%, when using low-flow shower head
to 38% when using rainwater harvesting systems. Some of the options (faucet aerators, low-flow shower heads and dual flush
toilets) were found to be financially attractive with a pay back period of less than their expected lives, others (rainwater
harvesting, graywater reuse and dry toilets) were found to be financially unattractive because of the high investment. In
the social context, it was found that introducing such options can improve the quality of life of those not having enough
water. There is already a popular willingness to take part in water conservation in the domestic sector in the West Bank.
The strongest driving force for using water conservation measures is the awareness that water is a scarce resource. It was
concluded that, theoretically, the house of tomorrow can be largely independent in terms of water and sanitation. Education
and awareness campaigns in the context of water management with a focus on non-traditional options are key to achieve such
a house. 相似文献
18.
贾香香 《水资源开发与管理》2020,(3):52-55,48
本文采用定额法、趋势分析法、年均增长率法、回归分析法等需水预测常用的方法,对泉州市城镇居民综合生活用水进行预测分析,经多种预测结果比较得出泉州市2030年城镇居民综合生活需水量为8.62亿m 3。其中定额法、回归分析法预测结果较好,趋势分析法和年均增长率法更常用于经济社会发展指标的预测。随着中国城镇化水平不断推进,居民综合生活用水量的影响愈加多元化、横向化,建立多元回归预测分析模型来预测用水量是很好的选择,该研究可为其他城市预测规划水平年居民生活用水量提供借鉴。 相似文献
19.
结合不同的灌浆工艺,对国内数家厂商生产的灌浆料进行预应力孔道灌浆密实性试验。试验结果表明,各种灌浆材料都有泌水发生,都存在灌浆不密实的现象。真空灌浆工艺的灌浆效果优于普通灌浆工艺,但也不能完全解决灌浆不密实的问题。为此,结合具有自主知识产权的预应力孔道灌浆密实装置,对带垭口波纹管的灌浆密实性进行试验验证,其效果良好,能有效解决灌浆过程中的泌水问题,从而达到保证预应力筋与灌浆材料的粘结强度和防治预应力筋锈蚀的目的。 相似文献
20.
Rietveld LC Norton-Brand?o D Shang R van Agtmaal J van Lier JB 《Water science and technology》2011,64(7):1540-1546
The implementation of wastewater reuse is becoming an increasingly important means of supplementing water supply needs and/or reducing costs. The present paper provides examples of possible uses of treated domestic effluent for the three sectors, i.e. public water supply, industrial and agricultural uses with the aim to address the feasibility of these applications. It is concluded that, although The Netherlands as a whole is considered to be a low water stressed country, regional fresh water scarcity and costs can result in the need for applications of domestic wastewater reuse. 相似文献