Phosphorus and the Kawartha Lakes - Lakefield Herald

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2.0 Watershed Land Classification and Delineation Introduction The first step in determining land use relationships with lake phosphorus concentrations is establishing where and what kinds of land use are prevalent. This first chapter is devoted to determining both, the quantity and location of quaternary (MNRs most detailed watershed delineation) watersheds, and the land use within each. Methodology Ontario’s NRVIS database (MNR, 2002) and the Water Resources and Information Project (WRIP)(MNR, 2006) were utilized to acquire land class information and watershed delineations. These datum were then overlaid and analysed using ArcMap® to determine watershed boundaries and the land uses within them. Results It was found that the Kawartha Lakes watershed (8,990 km 2 ) consists of 31 quaternary watersheds. As seen in Figure 2.1, of the possible 28 land uses identified by the NRVIS datum the Kawartha Lakes Watershed is represented by 21 different land uses. Interestingly, the chain of lakes running West/East through the middle of the watershed (Trent Severn Waterway) run parallel with a transition zone between forested Canadian Shield (metamorphosed limestone and/or granite) catchments to the north and agricultural glacial till catchments to the south. This transition zone includes a significant limestone alvar plain that runs through the Kawartha Lakes watershed. Principal Components Analysis (PCA) demonstrates a clear gradient between forested and agricultural catchments (Figure 2.2). Exact watershed areas and percent land classifications for each of the 31 watersheds are located in appendix A. 5
IJ 2 IJ 18 IJ 5 IJ 1 IJ 3 Legend IJ 4 IJ 20 Water FreshwaterMarsh Deciduous Swamp ConiferSwamp open fen open bog treed bog dense deciduous dense coniferous coniferous plantation mixed deciduous mixed coniferous sparse coniferous sparse deciduous recent cutover bedrock/sand/gravel settlement pasture and abandoned fields cropland alvar unclassified IJ 6 IJ 14 IJ 12 17 IJ 21 IJ 29 IJ 7 IJ 9 IJ 11 IJ 10 IJ 23 IJ 16 IJ 15 IJ 24 IJ 25 IJ 19 IJ IJ 22 IJ IJ 27 IJ 30 IJ 31 IJ 8 Peterborough 4.5 {Kilometers IJ 13 IJ 26 0 9 18 27 36 Figure 2.1 NRVIS land classification for the 31 watersheds of the Kawartha Lakes region. Note that forested areas are located in the north on the Canadian Shield and agricultural areas are located to the south on glacial till. Watershed Id’s are depicted in white pentagons. 6
Page 1 and 2: Phosphorus and the Kawartha Lakes (
Page 3 and 4: Table of Contents EXECUTIVE SUMMARY
Page 5 and 6: List of Tables Table 1.0 Values for
Page 7 and 8: Figure 5.2 Linear regression of Aug
Page 9 and 10: mobilization process can be quite c
Page 11: 1994; MOE, 1976), Ministry of Natur
Page 15 and 16: Take Home Message Previous models o
Page 17 and 18: Results Although the Kawartha Lakes
Page 19 and 20: 1 1 1 1 1 2 1 1 1 1 1 1 1 1 1 1 Lam
Page 21 and 22: Table 4.1 Watersheds employed in la
Page 23 and 24: Results - Multiple Regression Model
Page 25 and 26: 5.0 Past and Present Phosphorus lev
Page 27 and 28: 40 Phosphorus (µg/l) 35 30 25 20 1
Page 29 and 30: Conclusion The majority of the arch
Page 31 and 32: References Bayley, S.E. Prather, C.
Page 33 and 34: Schindler, D.W., 1987. Detecting ec
Page 35 and 36: Appendix A Watershed Land classific
Page 37 and 38: Land Class / Watershed ID 17 18 19
Page 39 and 40: Appendix B Land classification buff
Page 41 and 42: deciduou -0.2521 -0.1579 0.0578 0.2
Page 43 and 44: Pearson and Kendall Correlations wi
Page 45 and 46: Chapter 4 Regressions Buffer Bivari
Page 47 and 48: Bivariate Fit of Average P (ug/l) B
Page 49 and 50: Watershed Accumulation Bivariate Fi
Page 57 and 58: Stats for Figure 5.2 Oneway Analysi
Page 59 and 60: Stats for Figure 5.4 Nonlinear Regr
Page 61 and 62: Data used in Figure 5.2 Year 1971 1
Page 63 and 64:
Appendix E Basin Contribution Diagr
Page 65 and 66:
Sturgeon Lake 6 Drainage Basins + u
Page 67 and 68:
Chemong Lake 1 Drainage Basin 0 5 1
Page 69 and 70:
Rice Lake 4 Drainage Basins + up ca
Page 71 and 72:
Trent Severn Waterway Flow Overview
Page 73 and 74:
Central Kawartha Lakes (Sturgeon, K
Page 75:
Appendix G Future Considerations Th
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