搜索结果: 1-15 共查到“理学 mid-Wales”相关记录16条 . 查询时间(0.09 秒)
Lanthanum, cerium, praseodymium and yttrium in waters in an upland acidic and acid sensitive environment, mid-Wales
upland acidic mid-Wales acid sensitive environment
2009/5/18
The less than 0.45 mm filterable lanthanum (La), cerium (Ce), praseodymium (Pr) and yttrium (Y) concentrations in rainfall, cloud water, stream and groundwater in the upper River Severn catchments of ...
Determination of bromide, chloride, fluoride, nitrate and sulphate by ion chromatography: comparisons of methodologies for rainfall, cloud water and river waters at the Plynlimon catchments of mid-Wales
bromide chloride fluoride nitrate sulphate Plynlimon catchments
2009/5/6
The results of determination of bromide, chloride, fluoride, nitrate and sulphate using ion chromatography (IC) are compared with those obtained by colorimetric and inductively coupled plasma optical ...
Dissolved iodine in rainfall, cloud, stream and groundwater in the Plynlimon area of mid-Wales
rainfall cloud groundwater Plynlimon area
2009/5/6
Iodine concentrations in rainfall, cloud water, throughfall, stemflow, stream water and groundwater are described for the upper River Severn Plynlimon catchments in mid-Wales. Iodine concentrations av...
The long-term water balance (1972–2004) of upland forestry and grassland at Plynlimon, mid-Wales
long-term water balance grassland upland forestry
2009/5/6
This paper reviews research into the hydrological impacts of UK upland forestry and updates the water balance of the Plynlimon research catchments for the period 1972–2004. Comparison of this network ...
Cycling of nutrient base cations in a twelve year old Sitka spruce plantation in upland mid-Wales
Forestry base cations
2009/3/24
The effects of the early growth of plantation forestry on the biogeochemical cycling of potassium, calcium and magnesium have been investigated in a stand of 12 year old Sitka spruce and adjacent moor...
Sodium and chloride levels in rainfall, mist, streamwater and groundwater at the Plynlimon catchments, mid-Wales: inferences on hydrological and chemical controls
Sodium chloride rainfall mist
2009/3/24
Variations in sodium and chloride in atmospheric inputs (rainfall and mist), stream runoff and groundwater stores are documented for the upper Severn River (Afon Hafren and Afon Hore catchments), Plyn...
Effects of plantation forest clearfelling on stream temperatures in the Plynlimon experimental catchments, mid-Wales
stream temperature air temperature
2009/3/24
Hourly stream temperatures monitored over 28 months, which spanned a 3 month period of environmentally sensitive plot-scale harvesting of 20 ha. (20%) of the Nant Tanllwyth catchment (0.89 km2) on the...
Long-term changes in the water quality of rainfall, cloud water and stream water for moorland, forested and clear-felled catchments at Plynlimon, mid-Wales
Calcium aluminium ammonium pH
2009/3/24
Long term changes in the water quality of rainfall, cloud water and stream waters draining acidic and acid sensitive moorland and forested catchments at Plynlimon, mid-Wales, are examined for the per...
Assessing environmental impacts on stream water quality: the use of cumulative flux and cumulative flux difference approaches to deforestation of the Hafren Forest, mid-Wales
Plynlimon stream Hore acid neutralisation capacity calcium
2009/3/17
A method for examining the impacts of disturbance on stream water quality based on paired catchment “control‿ and “response‿ water quality time series is described in relation to diagrams ...
Nutrient concentrations and fluxes for podzolic and gley soils at Plynlimon, mid-Wales: implications for modelling inorganic nitrogen and phosphorus in upland UK environments
Plynlimon Hafren Hore streams nitrate ammonium
2009/3/17
The effect of felling on stream nitrate, ammonium and soluble reactive phosphate (SRP) concentrations is examined for acidic and acid sensitive Sitka Spruce afforested catchments with podzolic and gle...
Impacts of forestry on nitrogen in upland and lowland catchments: a comparison of the River Severn at Plynlimon in mid-Wales and the Bedford Ouse in south-east England using the INCA Model
afforestation water quality nitrogen modelling land-use change Wales
2009/3/5
The impacts of afforestation at Plynlimon in the Severn catchment, mid-Wales, and in the Bedford Ouse catchment in south-east England are evaluated using the INCA model to simulate Nitrogen (N) fluxes...
The water quality functioning of the upper River Severn, Plynlimon, mid-Wales: issues of monitoring, process understanding and forestry
nutrients trace metals Plynlimon River Severn forestry fractals
2009/3/5
An overview of hydrochemical studies of the upper River Severn catchment in the Plynlimon region of mid-Wales, as linked to twenty years of research at CEH Wallingford, is presented. The work provides...
The impact of conifer harvesting on stream water quality: the Afon Hafren, mid-Wales
deforestation water quality acidification pH nitrate alkalinity aluminium
2009/3/5
Results for long term water quality monitoring are described for the headwaters of the principal headwater stream of the River Severn, the Afon Hafren. The results are linked to within-catchment infor...
The water quality of streams draining a plantation forest on gley soils: the Nant Tanllwyth, Plynlimon mid-Wales
water quality conifer harvesting nitrate phosphate alkalinity Plynlimon Tanllwyth groundwater
2009/3/5
The water quality of the Nant Tanllwyth stream in the Plynlimon region of mid-Wales is related to the key hydrobiogeological controls and the effects of conifer harvesting based on an analysis of rain...
The hydrochemistry of plantation spruce forest catchments with brown earth soils, Vyrnwy in mid-Wales
Gran alkalinity aluminium harvesting nutrients Vyrnwy water quality
2009/3/5
At Vyrnwy, in mid-Wales, a study of the hydrogeochemistry of two small spruce forested catchments, one a control and one felled midway through the study, shows a classic picture of rainfall inputs dam...