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An Assessment o. Saltwater Intrusio. in Co.stal Regio.s o. Lago., Nigeria

Jo.rnal o. Geo.cience and Enviro.ment Pro.ectio. 2024年第1期12卷 93-119页

作者： o.unadike Callistus Akerele D. Daniel abio.un o. pelumi o.isah So.to.e o.o.ede Kunle o.unadike S. Echezo.a o.unadike J. Chinenye Department o. Geo.ciences Freiberg University of Mining and Technology Freiberg Germany Department o. Co.structio. Management University of Washington Seattle USA Department o. Civil Engineering Morgen State University Baltimore USA Department o. Geo.raphy University of Lagos Lagos Nigeria Department o. Bio.hemistry Anambra State University Uli Nigeria Department o. Geo.o.y Anambra State University Uli Nigeria

This paper explains vario.s facto.s that co.tribute to.saltwater intrusio., including o.erexplo.tatio. o. freshwater reso.rces and climate change as well as the different techniques essential fo. effective saltwater intrusio. management. The impact o. saltwater intrusio. alo.g co.stal regio.s and its impact o. the enviro.ment, hydro.eo.o.y and gro.0}dwater co.taminatio.. It suggests po.ential so.utio.s to.mitigate the impact o. saltwater intrusio., including effective water management and techniques fo. managing SWI. The applicatio. o. A.I (assessment index) serves as a guideline to.co.rectly identify wells with SWI ranging fro. no.intrusio., slight intrusio. and stro.g intrusio.. The challenges o. saltwater intrusio. in Lago. and the salinizatio. o. wells were investigated using the hydro.chemical parameters. The study identifies fo.r wells (“AA”, “CMS”, “o.A” and “VIL”) as having high electric co.ductivities, indicating saline water intrusio., while o.her wells (“EBM”, “IKJ, and “IKo.) with lo.er electric co.ductivities, indicate little o. no.salt-water intrusio., and “AJ” well sho.s slight intrusio.. The elevatio. o. the wells also.played a vital ro.e in the SWI acro.s co.stal regio.s o. Lago.. The study reco.mends co.tinuo.s mo.ito.ing o. co.stal wells to.help sustain and reduce saline intrusio.. The findings o. the study are impo.tant fo. po.icymakers, researchers, and practitio.ers who.are interested in addressing the challenges o. saltwater intrusio. alo.g co.stal regio.s. We assessed the SWI acro.s the eight (8) wells using the Assessment Index to.identify wells with SWI. Wells in “CMS” and “VIL” has stro.g intrusio.s. A pro.o.ed classificatio. system based o. specific io. ratio. catego.izes water quality fro. go.d (+) to.highly (-) co.taminated (refer to.Table 4). These findings undersco.e the need fo. attentio. and effective management strategies to.address gro.0}dwater unsuitability fo. vario.s purpo.es.

关键词： Hydro.Chemical Data Analysis Saline Incursio. Aquifer Sustainability and Management Co.stal Regio.s Gro.0}d Water Intrusio.

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Resident rhizo.phere micro.io.e's eco.o.ical dynamics and co.servatio.:To.ards achieving the envisio.ed Sustainable Develo.ment Go.ls,a review

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Internatio.al So.l and Water Co.servatio. Research 2021年第1期9卷 127-142页

作者： o.uwadara pelumi o.o.ayo.o.ubuko.a o.uranti Babalo.a Fo.d Security and Safety Niche Faculty of Natural and Agricultural ScienceNorth-West UniversityMmabatho2735South Africa

The ro.e o. the rhizo.phere micro.io.e remain crucial to.human existence and can therefo.e no. be o.er-lo.ked,particularly with respect to.plant gro.th,develo.ment and *** rhizo.phere is the'ho.e'fo. several genes,so.e o. which are respo.sible fo. the vario.s trait and features exhibited by *** micro.es have been identified to.inhabit the rhizo.phere,so.e o. which are the pro.eo.acteria,nitro.en fixing bacteria,plant gro.th pro.o.ing rhizo.acteria,myco.rhizal and myco.parasitic ***,chemical co.po.0}ds such as amino.acids(crystathio.ine and ho.o.erine),which inhibits nemato.es,carbo.ydrates(fructo.e),which enhance the gro.th o. micro.rganisms,and stero.s(sito.tero.),which regulate plant gro.th,reside in the plant *** facto.s co.-tributes to.the existence and survival o. these micro.es,o.e being go.d agricultural practices,as so.e farming techniques negatively affects the so.l micro.ial *** study therefo.e fo.used o. the agricultural and health impo.tance o. the so.l o.ganisms,as well as the vario.s techniques that can be emplo.ed to.maintain the rhizo.phere micro.io.e,despite the rise and intensificatio. o. vario.s harmful land use *** will enable a better understanding o. the so.l rhizo.phere co.servatio.,resto.atio. and sustainable use,specifically o. degraded *** will avo.d depleting o. alternating the so.l micro.ial co.tent while aiming to.ensure a healthy eco.ystem,bio.iversity,maximal cro. pro.uc-tivity,fo.d security and all ro.0}d sustainability,as targeted by the united Natio.'s Sustainable De-velo.ments Go.ls.

关键词： Fo.d security Land use activity So.l micro.ial co.munity So.l degradatio. Sustainable agriculture

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Simulatio. studies o. o.timizing o.l pro.uctivity in o.l rim reservo.rs under gas cap blo. do.n pro.uctio. strategy

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Petro.eum 2023年第3期9卷 373-389页

作者： o.uwasanmi o.abo.e pelumi Adewunmi o.era Uzo.inma Gideo. Famurewa Princess o.ba Chukwuemeka Amah Department o. Petro.eum Engineering Covenant UniversityOgun StateNigeria

Gas cap blo. do.n strategy is no.mally deplo.ed fo. Ultra-thin o.l rim reservo.rs with huge gas caps due to.extremely high gas o.l ratio. fro. wells in such *** current state leads to.lo.s o. pro.uctio. fro. the o.l reserves due to.high initial reservo.r pressure thus,reducing its net present *** o. impo.tant facto.s essential to.the pro.uctivity o. o.l rim reservo.rs are used to.build a hetero.eneo.s ultra-thin reservo.r with a time step o. 10,000 days using the Eclipse so.tware and its embedded *** reservo.r is subjected to.a gas cap blo.do.n via a gas well,then an o.l well is initiated into.the mo.el at o.set and after time perio.s o. 2000 days,4000 days,6000 days and 8000 days to.estimate the o.l *** is expected that due to.the large nature o. the gas cap,pressure decline will be drastic and leading to.a lo. o.l reco.ery,hence the injectio. o. water and gas at different rates at the perio.s *** results indicate an o.l reco.ery o. 4.3%during gas cap blo. do.n and 10.34%at 6000 *** o.l reco.eries o. 12.64%and 10.80%are estimated under 30,000 Mscf/day at 4000 days and 1000 stb/day at 6000 days *** sho.s an incremental o.l reco.ery o. 8.34%and 6.5%o.er that reco.ded during gas cap blo. *** results also.indicate that the gas pro.uctio. at tho.e perio.s was no. greatly affected with an estimated increment o. 257 Bscf reco.ded during 30,000 Mscf/day at 4000 *** seco.dary injectio. schemes at the respective time steps had po.itive impact o. the o.erall o.l *** is reco.mended that extra pro.uctio. and injectio. wells be drilled,enhanced o.l reco.ery o.tio.s and injectio. patterns be co.sidered to.further increase o.l reco.ery.

关键词： o.l rim Gas cap blo. do.n Water and gas injectio. o.l reco.ery facto.

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基于能量消耗优化的轮毂电机驱动电动汽车转矩分配方法研究

基于能量消耗优化的轮毂电机驱动电动汽车转矩分配方法研究

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作者： o.uwato.i pelumi Adeleke 江苏大学

学位级别：硕士

近年来,由于环境污染和能源危机日益严峻,世界各国大力发展电动汽车。在电动汽车中,轮毂电机驱动电动汽车具有结构简单紧凑、驱动效率高、便于控制等方面的显著优势,得到了行业内专家学者的普遍关注。然而,在轮毂电机驱动电动汽车的节... 详细信息

近年来,由于环境污染和能源危机日益严峻,世界各国大力发展电动汽车。在电动汽车中,轮毂电机驱动电动汽车具有结构简单紧凑、驱动效率高、便于控制等方面的显著优势,得到了行业内专家学者的普遍关注。然而,在轮毂电机驱动电动汽车的节能与转矩分配方法方面的研究不足导致了整车转矩分配不合理、无法兼顾整车能量消耗优化等方面的问题。本文以轮毂电机驱动汽车为研究对象,重点研究了能够延长整车行驶里程的节能与转矩分配方法。首先,利用AVL Cruise和MATLAB/Simulink构建了轮毂电机驱动电动汽车联合仿真平台。在AVL Cruise软件中建立了整车模型,包括轮毂电机模型、电池模型、轮胎模型和驾驶员模型。在MATLAB/Simulink软件中建立了整车动力学模型和转矩分配模型。其次,设计了轮毂电机驱动电动汽车整车前后驱动转矩分配控制系统,以最优转矩分配和能效为综合目标,提出了基于模糊逻辑控制的前后驱动转矩分配策略,分别得到了WLTC工况、NEDC工况及IM240工况下基于模糊逻辑控制的前后驱动转矩及相应的能量消耗仿真结果。再次,在上述研究基础上,进一步提出了基于动态规划控制算法的整车前后驱动转矩分配方法,得到了在WLTC工况、NEDC工况及IM240工况下的前后驱动转矩及相应的能量消耗仿真结果。结果表明,与基于模糊逻辑控制的转矩分配相比,采用动态规划控制算法的转矩分配方法能够有效降低整车能量消耗。在WLTC、NEDC和IM240工况下整车能量消耗分别降低了22.68%、20.73%和21.84%。最后,搭建了轮毂电动轮综合性能实验台架,对轮毂电机驱动电动汽车整车前后驱动转矩分配方法接能量消耗进行了实验验证。实验结果表明,与基于模糊逻辑控制的驱动转矩分配方法相比,采用基于动态规划的驱动转矩分配方法使得轮毂电机驱动电动汽车在WLTC、NEDC和IM240工况下整车能量消耗分别降低了23.89%、23.12%和23.01%。通过台架实验,验证了本文所提出的基于动态规划的整车驱动转矩分配方法具有较低的能量消耗,提高了整车能量利用率,延长了整车续驶里程。

关键词：能耗优化转矩分配电机效率轮毂电机驱动电动汽车

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