| Swan mussels are highly sensitive to siltation and other environmental changes. |
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| The objective is to minimise poaching, overgrazing and soil erosion as this can lead to siltation and nutrient enrichment of surface waters. |
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| The environmental effects of careless logging have led to soil erosion, polluted rivers, siltation and severe flooding. |
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| Additionally, once logged, many national forests are prone to flooding, mudslides and stream destruction due to runoff and siltation. |
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| Habitat degradation, facilitated largely through increased siltation due to unsound land use practices needs to be further curtailed. |
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| Current threats include habitat loss or deterioration by siltation and increased turbidity, and impoundment of riffle areas. |
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| It was conjecture that other creeks might have contributed to the excess siltation. |
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| It may be desirable to remove silt from the streambed using appropriate mitigation techniques in order to prevent siltation further downstream. |
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| When the structure is removed, wheel ruts and any other damage that may cause siltation in the stream should be repaired. |
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| Promote restoration of forests in basin headwaters in order to alleviate siltation of rivers and sand deposition. |
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| Lowlevel gold mining also occurs in this area, which threatens to increase erosion and siltation of aquatic systems. |
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| Other undesirable changes to sculpin habitat include elevated water temperature, increased siltation of substrate and loss of riffle habitat. |
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| However, there are as yet no hard and fast rules to determine threshold levels of erosion and siltation with respect to fish populations. |
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| As a result, each year India is estimated to lose the equivalent of two-thirds of the new storage it builds to siltation. |
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| In areas subject to heavy siltation, this dredged area will almost certainly act as a silt trap. |
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| The latter included riverbank erosion, siltation, gully erosion and wetland depletion covering 2.4 per cent of the total area. |
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| We have to look at the different kinds of currents, the siltation, the water quality before we start really understanding these dumps. |
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| The cutting took place close to the brook and led to a number of siltation events. |
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| Overgrazing in the surrounding lowlands and logging in the highlands are causing severe soil erosion, which in turn has caused heavy siltation in the lake. |
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| The company also built 18 sediment ponds between 2004 and 2005 to reduce siltation in the water. |
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| This water in the streets is the water that fills the rivers and cause flooding and siltation. |
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| This can reduce the filtering quality of wetlands and increase siltation, the pollution of water by fine dirt, sand, or clay. |
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| A suitable method for reducing turbidity is a siltation tank. |
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| Heavy siltation of rivers during rainfall, decline in soil fertility and increased incidence of landslides are among the constant reminders of deforestation and watershed degradation in small island developing States. |
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| The efficiency of hydropower generation can also be reduced through dam siltation caused by increased run-off from deforested land, and other poor land use practices. |
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| Encroachment into potential flood avenues resulted in jumpouts, flooding, and extensive siltation. |
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| There are problems with siltation of reservoir bottom, which needs to be cleaned. |
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| Effective drainage will minimize erosion and siltation. |
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| Defence counsel argued that sediment is a naturally occurring material, and there was no proof of how much, if any, siltation was caused by the road construction as opposed to other sources. |
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| Despite repeated efforts, I have not been provided evidence to show that DFO staff took a water sample from the watercourse during a siltation event or that DFO relied on a sample that was taken during a siltation event. |
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| In these circumstances the use of a pump to remove silted water contained within cofferdams is necessary to prevent siltation of downstream areas. |
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| This increase may be countered by decreases in generation associated with siltation and debris in flooded areas, as well as decreases associated with reduced river flows in areas, affected by drought. |
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| These accelerate siltation in rivers and lakes and pollute water reserves. |
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| Various surveys around siltation, tidal patterns and water flow have indicated that the lobster grounds in and around the bridge have been severely affected. |
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| Any wheel ruts or other damage that may cause siltation in the stream must also be repaired to prevent silt from being discharged into the stream. |
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| Nadeau noted siltation in a small stream flowing into a wetland area where some siltation had also occurred. |
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| Description : This salvage logging site on an old burn located on a severe south aspect with xeric soils near Chist Creek, Kitimat, BC, will continue to provide a siltation source from the eroding slopes. |
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| Today, however, community members in Verata Tikina, a county of seven villages, are worried about threats to their marine resources caused by overharvesting and siltation. |
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| Plainly, the rate at which siltation and erosion take place is such as to put them beyond the scope of a provisional measures order whose justification must lie in an urgency measured in a matter of days. |
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| Channels are to be evaluated individually by applying the siltation and the potential presence of obstacles due to the spring run-off and break-up of ice cover scales below. |
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| The power generating company KENGEN is concerned about silting in the dams and is working with partners to ensure that catchment areas are forested to prevent further siltation of the dams. |
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| He said they may have boomed because of overfishing, which removed many of its natural predators, and siltation, which brings nutrients to the sea that encourage their growth. |
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| It is instead forced directly into streams or storm water runoff drains, where erosion and siltation can be major problems, even when flooding is not. |
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| This has a negative effect on dams and subsequently their power stations, particularly those on rivers or within catchment areas with high siltation. |
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| Siltation from development projects often results in the loss of refugia for Hellbenders, as the large rocks and their openings become smothered. |
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| Siltation can fill a reservoir and reduce its capacity to control floods along with causing additional horizontal pressure on the upstream portion of the dam. |
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