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Evaluation Criteria and Model for Risk Between Water Supply and Water Demand and its Application in Beijing 总被引:3,自引:0,他引:3
In China, studies on water supply and water demand balance have received much attention, but risk between water supply and water demand lacks the same focus. This paper presents evaluation criteria of risk between water supply and water demand, which includes threat, susceptibility, and vulnerability. A new quantitative definition of threat is given based on fuzzy probability; Susceptibility is proposed for evaluating the inherent state of the water resource systems; Vulnerability is qualitatively defined and computed in terms of economic losses. A model for risk evaluation is developed based on the maximum entropy principle and discriminant analysis. Risks in Beijing, used as a case study, are evaluated under different scenarios of inflow. The results show that all the risks in 2020 are first or second grade. After using reclaimed water and transferred water, the third grade and fourth grade risk account for 75 %, with 25 % of the first grade and second grade risk. Therefore, risks are still high in the situations of low precipitation periods. 相似文献
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Qian Longxia Zhao Yong Yang Jianhong Li Hanlin Wang Hongrui Bai ChengZu 《Water Resources Management》2022,36(4):1141-1157
Water Resources Management - Multivariate hydrological frequency analysis is important when designing hydraulic and civil infrastructures. However, hydrologic data scarcity and insufficiency are... 相似文献
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油气及其配套产业往往在石油资源型城市产业结构中一枝独秀,然而由于油气资源的不可再生性,可采储量将随着时间的推移逐渐减少,致使一些石油资源型城市的持续发展遇到许多麻烦。高新技术产业的迅速发展,为石油资源型城市的可持续发展提供了路径。以国外的体斯敦、卡尔加里和国内的大庆和东营4个石油资源型城市为样本,分析了石油资源型城市发展高新技术产业的可行性和成功经验,具体包括:充分发挥政府职能,创建高新技术产业园区;注重产学研结合,实现高科技成果产品化;发挥独特资源优势,促进高新技术产业发展等。指出了我国石油资源型城市实现可持续发展存在的不足,阐明了改进的方向。 相似文献
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试样以混合溶剂溶融,盐酸浸取,定容移取分液后,在1.2~3.0 moL/L的盐酸介质溶液中,用抗坏血酸还原掩蔽锰和铁等干扰元素,二安替吡啉甲烷与钛生成黄色络合物,于波长420 nm处测量吸光度,计算TiO2的含量. 相似文献
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采用高通量测序技术解析4年和40年窖龄窖池不同部位窖泥原核微生物群落组成,并分析窖泥理化性质差异以及其对原核微生物的影响。结果表明,除总酸外,4年窖龄窖池窖泥样品的平均含水量、pH值、铵态氮含量、有效磷含量和α-多样性指数均低于40年窖龄窖池窖泥,40年窖龄上、中、下、底层窖泥理化性质及α-多样性均相对稳定,且4年和40年窖龄窖池窖泥理化指标的差异主要体现在上层和中层。从门和属水平组成上分析,40年窖龄窖池窖泥样品微生物群落结构相对稳定,且与4年窖龄窖池下层和底层窖泥样品更为相似。冗余分析(RDA)结果表明,总酸、有效磷和pH是影响不同窖龄和不同窖池位置窖泥中优势微生物菌群分布的主要理化因子。 相似文献
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试样用混合熔剂熔融,稀盐酸浸取,定容,移取部分试液,通过控制各元素的酸度,分别用光度法测定SiO2和P;EG-TA滴定法测定CaO,EDTA滴定法测定MgO;强碱沉淀分离氟盐置换、EDTA滴定法测定TAl。另称取1份试样用三氯化铁溶解,加入过量的氢氧化钠,滤液在pH值4.5的乙酸—乙酸铵缓冲介质中,加入过量的EDTA标准溶液,在煮沸条件下与MAl络合后,以PAN为指示剂,用铜标准溶液返滴定过量的EDTA;加氟化物取代,铜标准溶液二次返滴定,计算MAl量,再换算为Al2O3量。实验确定三氯化铁浓度为8%、用量50mL及用振荡器或摇动的最佳时间为60min。该方法测定SiO2、CaO、MgO、P、Al2O3及MAl的相对偏差分别小于0.718%、2.819%、1.171%、7.143%、0.178%和1.013%,完全满足快速分析的需要。 相似文献