Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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    Identifying groundwater recharge connections in the Moscow (USA) sub-basin using isotopic tracers and a soil moisture routing model
    Candel, J.H.J. ; Brooks, Erin ; Sanchez-Murillo, Ricardo ; Grader, George ; Dijksma, R. - \ 2016
    Hydrogeology Journal 24 (2016)7. - ISSN 1431-2174 - p. 1739 - 1751.
    Globally, aquifers are suffering from large abstractions resulting in groundwater level declines. These declines can be caused by excessive abstraction for drinking water, irrigation purposes or industrial use. Basaltic aquifers also face these conflicts. A large flood basalt area (1.1 × 105 km2) can be found in the Northwest of the USA. This Columbia River Basalt Group (CRBG) consists of a thick series of basalt flows of Miocene age. The two major hydrogeological units (Wanapum and Grand Ronde formations) are widely used for water abstraction. The mean decline over recent decades has been 0.6 m year−1. At present day, abstraction wells are drying up, and base flow of rivers is reduced. At the eastern part of CRBG, the Moscow sub-basin on the Idaho/Washington State border can be found. Although a thick poorly permeable clay layer exists on top of the basalt aquifer, groundwater level dynamics suggest that groundwater recharge occurs at certain locations. A set of wells and springs has been monitored bi-weekly for 9 months for δ18O and δ2H. Large isotopic fluctuations and d-excess values close to the meteoric water line in some wells are indicating that recharge occurs at the granite/basalt interface through lateral flow paths in and below the clay. A soil moisture routing (SMR) model showed that most recharge occurs on the granitic mountains. The basaltic aquifer receives recharge from these sedimentary zones around the granite/basalt interface. The identification of these types of areas is of major importance for future managed-aquifer recharge solutions to solve problems of groundwater depletion.
    Identifying groundwater recharge pathways in the Moscow sub-basin
    Candel, J.H.J. ; Brooks, E.S. ; Verhoeff, Eric ; Dobre, Mariana ; Sanchez-Murillo, Ricardo ; Grader, Jr., George W. ; Dijksma, R. - \ 2016
    Continual groundwater decline over the last 80 years in the Moscow-Pullman basin is motivating communities to explore a wide range of strategies ranging from reservoir development to direct injection to aquifers to ensure a sustainable regional water supply. Historic pumping records indicate the shallow Wanapum aquifer in the Moscow region does receive recharge however it is less certain that the deeper Grand Ronde aquifer is receiving any significant recharge. Moreover there is not a clear consensus in the region of the location of the major aquifer recharge flow paths. In this study we used both distributed hydrologic modeling based on detailed soil mapping and stable isotope tracers to explore and evaluate potential groundwater recharge pathways in the Moscow sub-basin. Modelling results indicate that subsurface water flow off the forested granitics in eastern margin of the sub-basin is likely a significant source of recharge. Biweekly water samples taken from 22 wells and 2 springs and high frequency streamflow and precipitation samples collected over a two year period throughout the Moscow sub-basin were analyzed for stable isotopes of hydrogen and oxygen. Frequency analysis of these stable isotope data suggest the some wells are receiving recharge. Furthermore many of these wells exist on the eastern margin of the sub-basin lending further support to the hypothesis that this region should be considered to be a critical ground recharge zone.
    Telen met Toekomst: Tmt -groepen aan de slag met nieuwe ontwikkelingen
    Kool, S.A.M. de - \ 2006
    BloembollenVisie 2006 (2006)101. - ISSN 1571-5558 - p. 20 - 21.
    innovaties - gewasbescherming - emissie - spuiten - toedieningswijzen - oogsten - verliezen bij het oogsten - schade - oogstmachines - bloembollen - kennis - maatregelen - innovations - plant protection - emission - spraying - application methods - harvesting - harvesting losses - damage - harvesters - ornamental bulbs - knowledge - measures
    De afgelopen maanden is in de verschillende groepen van Telen met toekomst gekeken naar allerlei nieuwe ontwikkelingen. Ervaring is opgedaan met Gewis, gekeken is naar de relatie tussen beschadiging en Erwinia in hyacint, hoogheemraadschap Rijnland ging aan de slag met de emissie-checklist en tulpentelers bekeken het effect van de Aqua-grader
    The development and testing of a flatfish grader
    Verbaan, A. - \ 1978
    Netherlands : Rijksinstituut voor Visserijonderzoek, Afdeling Technisch Onderzoek - 4
    Vergelijkende proeven met een 500 1 en een 800 1 dragline te Beltrum; Vergelijkende proef met bulldozer en dragline Steenbergen; Overslaan met draglines te Hoedekenskerke; Dempen van de Vrouwkensvaart; Proef met een motorlaadschop _ Aanleg van zandwegen met grader en bulldozer
    Anonymous, - \ 1959
    Wageningen : [s.n.] (Gestencilde mededelingen / Instituut voor landbouwtechniek en rationalisatie, Wageningen 1959, no. 7) - 24
    boerderij uitrusting - landbouwwerktuigen - land - landinrichting - ontginning - farm equipment - farm machinery - land - land development - reclamation
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