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Buffer strips

Soil & Water Conservation Society of Metro Halifax (SWCSMH)

July 26, 2006                                          Lake Carrying Capacities Homepage


Environment Canada's interim narrative on regression analysis between stream buffer widths and average TN and TP concentrations


A "Standard Buffer"

A "Standard Buffer" is defined as a particular length of site capable of trapping 953 kg. of sediment per year (USDA, 1977 [Source: Wilson, 1967]); Summary of curve numbers by land use (Panuska and Schilling, 1993 [Source: USDA, 1986]); Hydrologic soil groups (USDA, 1986); and nomograph parameters values from Nova Scotia (Beke and Webb, 1978)





Hydrogeochemical Responses to Forestry, Hayward-Holmes Watershed, New Brunswick

(Pomeroy et al)

The comparison of data indicates that minimal response was found in selected treatment. Results indicate that at least 17% of a watershed can be harvested with no stream response if a 30 or 60 metre stream buffer remains. The selection harvest within the buffer did not show a response. The most significant factor influencing treatment is buffer width, percent area and time required to re-vegetate. Other responses were due to erosion from road construction and the use of corrosive metal culverts.

The selection cut must allow sufficient timber to remain to utilize possible enhanced nutrient flux from the adjacent clear cut.

Factors involved in the magnitude of P transfer

(Haygarth, 1997)

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