It is recognised that forests tend to evaporate more water than shorter vegetation. In wet climates this may be explained by the increased losses of rainfall intercepted on the vegetative surfaces of trees. In dry climates forests, because they generally have deeper roots and are more able to access soil water during drought periods, also tend to evaporate more water than shorter vegetation. It would be expected, therefore, that forests have a negative influence on the sustainability of dry season flows from catchments, and combined with the higher infiltration of forest soils have a positive influence on reducing flood flows. However, reality indicates that more complex factors influence the water debit from forest regions.
The objective is : to quantify the effects of forestry (broadleaf and conifer) on flow
extremes - both dry weather flows and peak flood flows.
Short description of the project :
The project will determine the effects of forestry on extreme flows in relation to different tree species (Sitka spruce, Ash, Lodgepole pine, Eucalyptus, Maritime pine, spruce, beech and may be oak), stand age and silvicultural practices. The programme of work includes:
- analysis of existing long-term catchment records,
- detection of effects on streamflow of felling, coppicing or planting
- measurement of plot parameters such as transpiration, interception losses, soil
water, soil moisture, meteorological variables,
- production of a general model.
Funding SchemeCSC - Cost-sharing contracts
34346 Hann. Muenden
Bray Co Wicklow