20,148 research outputs found
Surface water channels and outfalls: recommendations on design
No full textThis report describes a research project funded by the Department of Transport which was carried out at HR Wallingford in association with the Transport Research Laboratory (TRL) from September 1992 to December 1994. The objectives of the study were: 1. to review the current situation and research needs concerning the use of surface water channels for road drainage; and 2. to prepare recommendations on outlet design and general recommendations on the use of surface water channels
Two hundred and fiftieth birthday anniversary of Wallingford, Connecticut, September 4, 5, 6, 1920; official program.
No full text1 p. leaf, 31 p
Guide to concrete dyke revetments
No full textThis document is an English translation of the Dutch report "Leidraad cementbetonnen di jkbekledingen", Rapport 119, Stichting voor onderzoek, voorschriften en kwaliteitseisen op het gebied van beton (CUR-VB), September 1984.
On the initiative of the contact group "Wet hydraulic engineering", which includes representatives of the Dutch cement industry, the Government Public Works Department , Technical University at Delft and the Agricultural University of Wageningen, a decision was made to commence a study on the subject of concrete block revetment on bank slopes, in coordination with the "Technical Advisory Committee on Sea and Freshwater flood defences (TAW), and the Organisation for research, specifications and quality requirements for concrete (CUR-VB). The Committee had the task of writing a guide concerning design, construction, management and maintenance of concrete block revetments
Benson Lane Crowmarsh Gifford Wallingford Oxfordshire
No full textThis collection comprises the images, survey data, and CAD plan drawings from an archaeological evaluation, undertaken by Oxford Archaeology at Benson Lane, Crowmarsh Gifford, Wallingford, Oxfordshire, in September 2018
FIMFRAME End of project presentations
No full textPresentations at the last FIMFRAME workshop on 16 September 2011. This pdf contains FIM FRAME workshop introduction, background to research, Metrics and tools, Development of the FIM FRAME method, Outputs and dissemination
Scour and Erosion: Proceedings of the 8th International Conference on Scour and Erosion (Oxford, UK, 12-15 September 2016)
No full textThe 8th International Conference on Scour and Erosion (ICSE 2016) was organised by HR Wallingford, Oxfordshire, UK and held at the Mathematical Institute, Andrew Wiles Building, The University of Oxford from 12 to 15 September 2016. Contributions were received across eight principal themes: internal erosion, sediment transport, grain scale to continuum scale, advanced numerical modelling of scour and erosion, terrestrial scour and erosion, river and estuarine erosion including scour around structures, coastal and offshore scour and erosion and, management of scour/erosion and sediment (including hazard management and sedimentation in dams and reservoirs). The conference included four keynote lectures from world leading academics and practitioners cutting across the themes of scour and erosion, together with 132 peer-reviewed papers from 34 countries
Dispersal of dredged material - Tees field study September 1986
No full textTo improve the knowledge of the physics involved in dredged material disposal, a field study was undertaken in September 1986 in co-operation with the Tees and Hartlepool Port Authority. The objectives were: 1. To characterise the dredged material within the hopper of the dredger prior to it being disposed of at the disposal site in respect of the density profile with depth, silt content and heavy metal concentrations. 2. To measure the extent of the near surface dispersion cloud released as the material plunged through the water column in the decent phase. 3. To determine the nature and velocity of the bed wave during the diffusive phase and to measure the effect on the propagation of this wave of the bed slope and current velocity. 4. To quantify the magnitude of bed level changes resulting from the repeated disposal of dredged material at the same location. 5. To examine the silt content and heavy metal concentrations on the bed material before and after the disposal exercise
The effect of temperature on the settling velocities of an estuary mud
No full textThe report describes an extension of the studies discussed in a previous report "A detailed study of the settling velocities of an estuary mud", Report No INT 78, September I97O.
Further detailed tests on a mud obtained from Avonmouth in the Severn Estuary were carried out in a bottom withdrawal tube 2 metres high to determine the effect of temperature on settling velocities.
After allowi.ng for changes in the viscosity of the suspension due to the variation in temperature, the settling velocities were found to vary little with temperature, with only a slight tendency towards greater flocculation and higher settling velocities at increasing temperatures
Informal irrigation in the peri-urban zone of Nairobi, Kenya - an analysis of farmer activity and productivity
No full textThis report follows on from findings of an initial questionnaire survey (ODTN 98). Daily recordings of the activities of 6 farmers from June to September 2000 were taken as a part of this study and have provided more detailed and quantitative technical, social and economic data on the irrigated production of people located in the peri-urban zone of Nairobi, Kenya
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