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首页> 外文学位 >Predicting local and regional effects of urbanisation on the subsurface water balance of north Pickering agricultural lands (Ontario).
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Predicting local and regional effects of urbanisation on the subsurface water balance of north Pickering agricultural lands (Ontario).

机译：预测城市化对Pickering北部农业用地的地下水平衡的局部和区域影响（安大略省）。

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摘要

This thesis explores the idea of quantifying expected urbanisation effects on groundwater recharge. Medium-density urban neighbourhoods were applied to a predominantly agricultural area in north Pickering, Ontario, in order to examine potential local and regional effects. Ideas of urban microclimate, urban leakage and impermeability were considered in depth. At a local (neighbourhood) scale, urban recharge values ranged from 43–134 mm/a, 57–148 mm, 110–205 mm and 140–233 mm, for natural recharge rates of 25 mm/a, 50 mm/a, 150 mm/a and 200 mm/a, respectively. A steady-state finite difference groundwater flow model (MODFLOW) was used to predict the regional watershed scale effects. Urbanisation significantly affected groundwater recharge, the water balance, velocity and direction of groundwater flow, and groundwater discharge to river flow. Both at the local and regional scale, the results suggest that recharge increase is much more of a concern than depletion.
机译：本文探讨了量化预期城市化对地下水补给的影响的想法。为了检查潜在的本地和区域影响，将中等密度的城市社区应用于安大略省北皮克林的主要农业地区。深入考虑了城市小气候，城市渗漏和抗渗性的思想。在当地（社区）范围内，自然补给率分别为25mm / a，50mm / a，43-134mm / a，57-148mm，110-205mm和140-233mm， 150 mm / a和200 mm / a。稳态有限差分地下水流模型（MODFLOW）被用来预测区域流域尺度效应。城市化极大地影响了地下水的补给，水的平衡，地下水流的速度和方向以及地下水向河流的排放。无论是在地方还是区域范围内，结果都表明补给的增加比消亡更令人关注。

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