搜索结果: 1-15 共查到“水文学 acidification”相关记录30条 . 查询时间(0.075 秒)
In 50 lakes in south-eastern Norway hydrogen-ion concentration (pH) and
total hardness ("dH) were measured in surface water in the 1950's and then
once again 10 years later. Significant acidificatio...
The chemistry of ground- and surface-water in areas of similar geologic settings
are compared by plotting the equivalent concentrations of each component
in an XY-diagram. The deviations of each che...
Acidification of Shallow Groundwaters During the Spring Melt Period
Acidification Shallow Groundwaters Spring Melt Period
2009/10/27
During the spring of 1985 shallow recharge area groundwaters at depths less
than one metre in the Turkey Lakes watershed were observed to undergo short
term (1 to 10 days) pH and alkalinity depressi...
Predicting soil acidification trends at Plynlimon using the SAFE model
soil acidification trends Plynlimon SAFE model
2009/6/8
The SAFE model has been applied to an acid grassland site, located on base-poor stagnopodzol soils derived from Lower Palaeozoic greywackes. The model predicts that acidification of the soil has occur...
Acidification in Three Lake District Tarns：Historical Iong term trends and modelled future behaviour under changing sulphate and nitrate deposition
Acidification nitrate deposition sulphate
2009/6/8
Three upland Lake District Tarns, Scoat, Greendale and Burnmoor, have been evaluated using MAGIC (Model of Acidification of Groundwater In Catchments) to reconstruct past, present and future chemical ...
Norwegian lakes show widespread recovery from acidification：results from national surveys of lakewater chemistry 1986-1997
Acid Neutralising Capacity Sulphate concentrations lakes
2009/6/5
Surveys of 485 lakes in Norway conducted in 1986 and again in 1995 reveal widespread chemical recovery from acidification. Sulphate concentrations in lakes have decreased by 40% in acidified areas in ...
Regional modelling of acidification in Wales：calibration of a spatially distributed model incorporating land use change
Wales acid neutralising capacity Model of Acidification of Groundwater In Catchments
2009/6/5
The Model of Acidification of Groundwater In Catchments (MAGIC) has been calibrated to 94 catchments in Wales, enabling the quantification of regional response to reduced emissions under the second s...
A comparison of methods for estimating soil characteristics in regional acidification models; an application of the MAGIC model to Scotland
Acid Neutralising Capacity soil depth soil physico-chemical
2009/6/5
The results from an application of MAGIC (Model of Acidification of Groundwater In Catchments) to 733 Scottish catchments are presented. The availability of representative, good quality soil data is f...
Modelling acidification, recovery and target loads for headwater catchments in Nova Scotia, Canada
time averaged rainfall hydrologic thresholds infiltration excess
2009/5/7
This paper investigates the effects of using non-linear, high resolution rainfall, compared to time averaged rainfall on the triggering of hydrologic thresholds and therefore model predictions of infi...
The impacts of future climate change and sulphur emission reductions on acidification recovery at Plastic Lake, Ontario
climate change Plastic Lake sulphur emission
2009/4/29
Climate-induced drought events have a significant influence on sulphate export from forested catchments in central Ontario, subsequently delaying the recovery of surface waters from acidification. In ...
Recovery from episodic acidification delayed by drought and high sea salt deposition
sea salt deposition episodic acidification
2009/4/29
For the prediction of episodic acidification large uncertainties are connected to climatic variability and its effect on drought conditions and sea-salt episodes. In this study data on 342 hydrologic...
The decreasing importance of acidification episodes with recovery from acidification：an analysis of the 30-year record from Birkenes, Norway
streamwater chemistry acid episodes
2009/4/29
The 30-year record 1975–2004 of weekly samples of streamwater chemistry from Birkenes, Norway, shows 106 acid episodes below the threshold of ANC−50 µeq l−1. The frequency, severity ...
Response of a first-order stream in Maine to short-term in-stream acidification
stream acidification ion exchange
2009/3/24
An experimental short-term acidification with HCl at a first-order stream in central Maine, USA was used to study processes controlling the changes in stream chemistry and to assess the ability of str...
Climate change as a confounding factor in reversibility of acidification: RAIN and CLIMEX projects
acid deposition global change
2009/3/24
The RAIN and CLIMEX experiments at Risdalsheia, southernmost Norway, together cover 17 years (1984-2000) of whole-catchment manipulation of acid deposition and climate. A 1200 m2 roof placed over the ...
Land use influences on acidification and recovery of freshwaters in Galloway, south-west Scotland
acidification afforestation deposition
2009/3/24
The long term response of surface waters to changes in sulphur deposition and afforestation is investigated for three upland river systems in the Galloway region of south-west Scotland. From 1984-1999...