| 41. | The river is long, with a drainage area of about.
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| 42. | Lovewell Pond has an actual drainage area of about.
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| 43. | It has a drainage area of 38.2 square miles.
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| 44. | The river is long with a drainage area of.
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| 45. | The total drainage area of the glacier is about.
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| 46. | Calderwood's reservoir covers approximately with a drainage area of.
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| 47. | The total drainage area of the river is approximately.
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| 48. | It controls runoff water from an drainage area.
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| 49. | The river has a total drainage area exceeding.
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| 50. | The drainage area of the lake is approximately.
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