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石油化工自动化 2013年第6期 9-9页

液位是工业生产中普遍需要且十分重要的测量参数,测量技术与仪表种类繁多,给用户在实际生产中对测量仪表的选择提供了很大的空间,但也给合理选择仪表带来难度。界位测量是一种特殊的液位测量,常见于化工生产中反应器及储罐中同一容器内... 详细信息

液位是工业生产中普遍需要且十分重要的测量参数,测量技术与仪表种类繁多,给用户在实际生产中对测量仪表的选择提供了很大的空间,但也给合理选择仪表带来难度。界位测量是一种特殊的液位测量,常见于化工生产中反应器及储罐中同一容器内多种介质的分界面测量。测量中有密度差小、乳化层、工况不稳等应用难点。传统液位计常由于温度、密度、压力

关键词：液位计储罐密度界位工况 swisa

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Rainwater harvesting,its prospects and challenges in the uplands of Talugtog,Nueva Ecija,Philippines

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International Soil and Water Conservation Research 2013年第3期1卷 56-67页

作者： Samuel M.Contreras Teresita S.Sandoval Silvino Q.Tejada Bureau of Soils of Soils and Water Management the Philippines Bureau of Soils and Water Management the Philippines

The prospects and challenges facing eight small water impounding projects(SWIPs)in Talugtog,Nueva Ecija,an upland municipality located in Central Luzon,Philippines were evaluated using rapid appraisal and documentation of projects,interview of farmers and local officials,and a review of related studies undertaken on the same project *** challenges include the deterioration of structural facilities,inactive farmers associations,watershed degradation,and climate *** also aims to evaluate improvement and innovation in the future implementation of SWIPs as rainwater harvesting *** site was selected because it has the largest number of SWIPs established as one of the coping strategies during the 1997-1998 severe El *** of its location,it has no major irrigation systems and relies only on local rainwater storage *** study involves 8 SWIPs established in two clusters(i.e.,5 and 3 SWIPs in a watershed)as rainwater conservation and management *** indicated these clusters of SWIPs offer multiple benefits in terms of supplemental irrigation,inland fish production,and water for domestic purposes and livestock *** also serve as strategic small-scale upland structures that enhance recharging of groundwater,prevent flooding,and provide value-adding activities such as recreation,soil and water conservation,and environmental *** studies also identified their benefits at the farm and community levels as conserved rainwater through storage in SWIPs is translated into more economic ***,some SWIPs are confronted with various challenges;deterioration of structural facilities,inactive farmer associations,unabated watershed degradation,and threats of climate *** are seriously affecting the overall performance of *** actions should include the strengthening of small water impounding system associations(swisa),repair and climate-proofing of structural facilities through the(swisa

关键词： Rainwater harvesting Small water impounding project Upland Watershed swisa

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