岩溶地区防渗帷幕膏状浆液灌注施工技术

介绍了宜兴市油车水库工程岩溶地区基岩灌浆施工技术,采用以"水泥净浆+优质膨润土"制成膏状浆液为灌注材料,使用普通灌浆设备,完成了岩溶地区基础防渗处理施工,可供同类工程参考。     

一种利用J函数建立含油饱和度模型方法研究

针对注水开发油田不同程度的水淹,以往利用测井解释的含油饱和度曲线建立的含油饱和度模型,不能满足油田开发需求。为了在模型中更真实地反映出地层的原始含油状态,首先把油藏条件下的毛管压力曲线转换成J函数,再利用多元回归得到J函数与含水饱和度间的关系,最后把由油水界面和储层构造深度计算得到油柱高度,经多元回归建立含油饱和度与孔隙度、渗透率和油柱高度的关系式,进而得到三维含油饱和度场,从而为储量复算和油藏数值模拟提供准确依据。     

长潭水库除险加固工程施工导流设计

以长潭水库为例,结合水库的坝体实际,对长潭水库除险加固工程的施工导流条件、导流方式及进度安排进行设计和施工,验收竣工后蓄水位恢复到正常蓄水位,达到百年一遇、万年校核的设计标准,证明除险加固工程的施工导流设计科学合理,对类似水利工程建设施工导流设计有重要参考价值.     

允楞水库大坝渗流异常特性有限元反演分析

允楞水库大坝浸润线异常,为了准确评价大坝的稳定状况,需要对其渗流特性作出准确分析.分析允楞水库大坝多组实测浸润线及现场钻孔压注水试验成果,建立大坝三维模型,反演大坝各区的透水性指标,以此对大坝进行稳定性评价.经综合分析,在实测资料条件下建立的三维模型能客观地反映大坝的渗流及稳定特性,为碾压土石坝的稳定评价提供理论依据和分析方法.     

陆浑水库汛限水位动态控制风险研究

结合陆浑水库的实际,探讨了以预泄调度方式实施汛限水位动态控制所面临的风险。研究了陆浑水库实施汛限水位动态控制域、动态控制实施条件、调度方式,重点对其所面临的风险和损失进行了评价和计算。结果表明,陆浑水库以预泄调度方式实施汛限水位动态控制是可行的,在风险允许的范围内,水库经济效益大大提高。     

成屏一级水库大坝除险加固设计

介绍了成屏一级水库混凝土面板堆石坝加高加固的设计方案和设计特点。通过详细叙述大坝除险加固的地质条件、工程布置、坝顶加高方案选择、混凝土裂缝处理及观测设计等步骤,提出相关建议,为今后类似工程的设计提供了经验和参考。     

强夯法在耿庄水库地基处理中应用

耿庄水库属半挖半填平原围封水库,大坝为碾压均质土坝,因坝基土具有湿陷性,故采用强夯法处理。根据工程实践,采用强夯处理后湿陷地基效果明显,地基承载力得到了有效的加强。     

张峰水库输水总干末端调蓄水池中复合土工膜的应用

复合土工膜是一种很好的防渗材料,它经济、适用,在水利工程防渗中被广泛应用。文中详细阐述了张峰水库输水总干末端蓄水池中复合土工膜的施工方法及质量控制。     

FISH RECRUITMENT IS INFLUENCED BY RIVER FLOWS AND FLOODPLAIN INUNDATION AT APALACHICOLA RIVER,FLORIDA

High human demand for limited water resources often results in water allocation trade‐offs between human needs and natural flow regimes. Therefore, knowledge of ecosystem function in response to varying streamflow conditions is necessary for informing water allocation decisions. Our objective was to evaluate relationships between river flow and fish recruitment and growth patterns at the Apalachicola River, Florida, a regulated river, during 2003–2010. To test relationships of fish recruitment and growth as responses to river discharge, we used linear regression of (i) empirical catch in fall, (ii) back‐calculated catch, via cohort‐specific catch curves, and (iii) mean total length in fall of age 0 largemouth bass Micropterus salmoides, redear sunfish Lepomis microlophus and spotted sucker Minytrema melanops against spring–summer discharge measures in Apalachicola River. Empirical catch rates in fall for all three species showed positive and significant relationships to river discharge that sustained floodplain inundation during spring–summer. Back‐calculated catch at age 0 for the same species showed positive relationships to discharge measures, but possibly because of low sample sizes (n = 4–6), these linear regressions were not statistically significant. Mean total length for age 0 largemouth bass in fall showed a positive and significant relationship to spring–summer discharge; however, size in fall for age 0 redear sunfish and spotted sucker showed no relation to spring–summer discharge. Our results showed clear linkages among river discharge, floodplain inundation and fish recruitment, and they have implications for water management and allocation in the Apalachicola River basin. Managed flow regimes that reduce the frequency and duration of floodplain inundation during spring–summer will likely reduce stream fish recruitment. Copyright © 2012 John Wiley & Sons, Ltd.     

高浓度调沙是减缓黄河下游河道淤积的有效途径

在浅析黄河下游河道淤积原因的基础上,指出高浓度调沙是减缓下游河道淤积的有效途径。为实现高浓度调沙,小浪底水库应该采用“蓄浑排清,清水刷槽;加沙造浓,高浓度输沙”的调水调沙方式,并通过“横向冲蚀”技术,来源源不断地形成高含沙水流出库。