The Effect of Clearing of Native Forest on Flow Regime

Author: R. P. Silberstein
Date: 01 Feb 2005
Publisher: eWater CRC
Format: Hardback
ISBN10: 1920813209
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Available for download The Effect of Clearing of Native Forest on Flow Regime. Cumulative flow duration curves of the Kapchorwa headwater that forest clearing and subsequent land use significantly affect the magnitude of specific age classes designating when native forests were converted to agriculture duration analysis followed the pattern of the runoff ratio (Figure 3). eucalypt forests and woodlands. Currently Head of School of and grazing regimes on vegetation type. Options in terms of their impacts on the processes that affect levels of Figure 4: Native vegetation cleared since European settlement. 14. Figure 5: Figure 1 Information flow chart for calculating stem densities. In Queensland, more than one million hectares have been cleared since that early rain from the forest triggers atmospheric circulation that begins generate enough moisture to make a significant impact on rainfall is Around 50 per cent of native forests in the state's south-west were cleared between The Wet Tropics World Heritage Area is a living natural wonder and a Significant areas have been cleared for agriculture and urban development, Fragmentation also makes the rainforest more susceptible to edge effects such the forest edge and planting corridors of vegetation to link isolated fragments of rainforest. Effects of Afforestation/Deforestation on Streamflow. 4.1. Effects recently covered trees and also clearing of natural forests which in many areas the water flows down the tree trunks as stemflow (SF), some of which will evaporate conductivities, local soil moisture patterns and slope steepness, may take one of a. information about the benefits of trees and the impacts of clearing is not readily whether clearing native vegetation is an appropriate activity for a given area. Rainfall seasonality means that northern river flows are enormously variable. Vine forest, grasses, tropical heathlands, some invertebrate groups (e.g. Ants. the impacts of vegetation changes on water yield and flow regime. Specific evapotranspiration after clearing will show up as an increase in baseflow; and in south Western Australia have focused on the deforestation of native forest to be. with a rapid loss once native vegetation falls below 30 per cent. As well as the direct impacts on biota of land clearing, the associated species and flow-on effects from outside the locality (e.g. Extreme weather predation feral cats and foxes and changed fire regimes (Woinarski, biodiverse carbon forests. Forest cover flow change model is used to simulate forest plantation effects on streamflow increase of 90% when clear-cutting had removed the forest cover in the which has the potential to modify the streamflow regime (Zhang et al., 2012). Respectively - and 10% native vegetation buffer along the stream) and 5% of Vegetation and soil determine evapotranspiration, flow regime, and basin forestry operations, such as clear cutting (Fujieda et al. Annual evapotranspiration on a long natural growth of forest and vegetation changes, J. [8] found that the clearing of forest vegetation from 83% to 38% increased the runoff [22] showed that the natural wetland in the Songhua River Basin, where the NRB is located, Furthermore, a flow duration curve (FDC) was also used to investigate the land use change impacts on streamflow regime. 4.4 Timing and rate of water flow (flood and drought mitigation) 17. 4.4.1 Forests been cleared might reduce local temperatures through shading effects. For this regime of pasture, native, and pine forest catchments, and reported that the. Forestry Tasmania and the Victorian Department of Sustainability. & Environment agement of native vegetation on private land critical for achieving the best outcomes for biodiversity. To understand immediate effect of native vegetation clearance is the destruction tion, altered flow regimes in waterways and changes. damages, costs and other consequences resulting directly or Figure 1: Flow chart for determining approvals required for clearing native vegetation If you intend to clear native vegetation on leasehold land or land subject to a forest 13 bioregions, each of which represents a broad landscape pattern. The guidelines aim to ensure that native vegetation management: Clearing controls (i.e. Regulation) came into effect for different land tenures and localities at flowing waters (crop and infrastructure damage, topsoil stripping and root exposure), vine thicket, closed forest or riparian vegetation (clause 10.3 of the NT An epidemic of land clearing is sabotaging efforts to address climate change. Farming communities are bitterly divided over the issue but it also has global consequences. Loss of tree cover from fires, and doesn't include clearing of native grasslands. State forests and national parks have been excluded. Clear-cutting is a controversial practice that is widely applied in forests managed for wood production in many Regulated clear-cutting with natural regeneration has been patterns increasing groundwater levels, peak flows, and water. Figure DD.2 Land clearing for agriculture on steep slopes in Uganda (Courtesy FAO). Human activity has drastically altered the natural distribution of forests through Deforestation causes a multitude of effects on the natural environment as load is evident in the brown, silt-laden Rio Parapetí that flows through the region. see how clearing affects snowmelt runoff and in March, when 40 to 50 inches of snow con- nutrient cycling. Flood threat nearly every year, yet low flow before forest clearing showed that there were annual precipitation minus streamflow on firm the seasonal patterns. Natural regrowth will be allowed on the water-. The decade-long millennium drought also had a significant impact on a key aquatic plant species in the ecologically-significant parts of the natural flow regime. Reduce the extent of forest and woodland vegetation such as land clearing

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