Turkey Lakes Watershed Study reference list: 2001

01-01  Scott*, B.F., C. Spencer, D.C.G. Muir, J. Martin, R. Barra, H. Bootsma, K. Jones and A.E. Johnson. Comparison of environmental levels of HAAS in the southern and northern hemispheres. NWRI Contribution 01-008, 11pp, 2001. (*Contact D. S. Jeffries for correspondence).

Summary: Soils, precipitation and conifer needles were analyzed from Chile, Canada, Malawi, and the U.K. to assess global concentrations of haloacteic acids (HAA). Precipitation from the TLW (Algoma CAPMoN samples) and two other more remote CAPMoN stations were included in the study. The TLW samples tended to have the highest HAA values, particularly trichloroacetic acid which ranged from 160 to 2400 ng/l. Overall results indicate higher HAA’s in the northern hemisphere, but significant concentrations in the southern hemisphere as well.

01-02     Wadleigh*, M.A., H.P. Schwarcz, and J.R. Kramer. Areal distribution of sulphur and oxygen isotopes in sulphate of rain over eastern North America. J. Geophys. Res. 106, No. D18, 20,883 - 20,895, 2001. (*Contact D. S. Jeffries for correspondence).

Summary: Three rain events were simultaneously sampled during the summer of 1986 from the Mississippi River to the Atlantic coast, and from the Gulf of Mexico to subarctic Canada in order to measure sulphur and oxygen isotope distribution and to assess anthropogenic input. The TLW (Algoma) monitoring site was one of the collection sites. Sulphur isotope ratios were quite homogeneous averaging +3.41 + 0.95 per mil. The combination of sulphur and oxygen isotopes provided information on long range transport and oxidation mechanisms.

01-03 Semkin, R.G., D.S. Jeffries, R. Neureuther, G. Lahaie, F. Norouzian, and J. Franklyn. Summary of hydrological and meteorological measurements in the Turkey Lakes Watershed, Algoma, Ontario, 1980-1999. National Water Research Institute Contribution No. 01-192, 42pp, 2001.

Summary: Hydrological and meteorological measurements made at the TLW since 1980 are summarized, including mean daily air temperature, wind speed and direction, relative humidity, barometric pressure and solar radiation. Precipitation quantity and gauged streamflow, along with basin-wide surveys of snow water equivalent are also provided.

01-04 Buttle, J.M., P.W. Hazlett, C.D. Murray, I.F. Creed, D.S. Jeffries, and R. Semkin. Prediction of groundwater characteristics in forested and harvested basins during spring snowmelt using a topographic index. Hydrological Processes 15: 3389-3407, 2001.

Summary: Piezometric surface elevations were monitored during snowmelt in 2 sub-basins in the TLW, (one mature hardwood and one clearcut,) during the spring of 2000 to test a hypothesized link between groundwater characteristics and topographic indices. A relationship was not confirmed but the potential to use groundwater residence time to evaluate the effects of forest harvesting was discussed. d18O values were measured for input water and groundwater to establish groundwater residence times.

01-05 Kreutzweiser, D.P., and S.S. Capell. Fine sediment deposition in streams after selective forest harvesting without riparian buffers. Can. J. For. Res. 31: 2134-2142, 2001.

Summary: Selective harvesting was carried out in the forest of the Turkey Lakes Watershed in 1997. This paper looks at the resulting fine sediment accumulation in the streams. Significant post-harvest increases in inorganic sediment bedloads were detected, but a greater increase was observed at a road-disturbance site where no harvesting was done. The current 30-m buffer in the riparian zone may not be necessary to prevent increased sediment loading to streams if care is taken to keep machinery and trees out of the stream channel while harvesting.

01-06 Sampson, P.H, P.M. Treitz, and G.H. Mohammed. Remote sensing of forest condition in tolerant hardwoods: an examination of spatial scale, structure and function. Can. J. Remote Sensing, 27, 232-246, 2001.

Summary: Using remote sensing, vegetation structure and physiological condition of the forest at the TLW following the TLW Harvesting Impact Project were examined. Three different methods of harvesting were compared - selection, shelterwood and clearcut. A Compact Airborne Spectrographic Imager acquired data at 3 altitudes, and results showed relationships between canopy opening and spectral indices.

01-07   Beall, F.D., R.G. Semkin, and D.S. Jeffries.  Trends in the output of first-order basins at Turkey Lakes Watershed, 1982-96.  Ecosytems 4, 514-526, 2001.

Summary: The TLW has been monitored since 1981 to examine trends related to acidic deposition. The proportion of annual runoff has decreased in winter and increased in spring, Sulphate concentration has decreased but associated recovery responses are not uniform. Cation depletion may be retarding basin recovery from acidification.