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Graph of the mean annual precipitation versus the elevation. Thirty town precipitation records are shown. This graph shows that with elevation gain there is a positive trend for increase in precipitation. The outlier is an extreme example, Mt. Mansfield.
Map of the Winooski drainage basin. The drainage basin is in yellow, outlined in white. The Winooski drainage basin is 1060 square miles (2745.387 Km^2) and drains into Lake Champlain.
The average precipitation over the state of Vermont is 42.5, calculated using the normal rainfall in inches over thirty towns in Vermont. The average precipitation that falls on the Winooski River Basin was determined using the online software StreamStats which determines the source of water from different streams throughout the United States. The Winooski River Basin gets an annual precipitation of 45.6 inches.
The total volume of precipitation that annually falls on the Winooski basin is shown by the calculation below.
The total run off volume over an average year on the Winooski River is calculated below.
The mean annual suspended loads and mean annual dissolved loads are calculated below.
From the data collected by USGS, the Winooski River Drainage Basin's annual rainfall was used for multiple calculations. The calculated average rainfall that enters the Winooski River Basin is 3.18 km^3/yr with a discharge of 1.623 km^3/yr. The amount of precipitation that is runoff of the river basin is around 51%. This runoff leaves the basin through multiple modes. Evaporation and transpiration are the two greatest influences when it comes to the runoff losses, there is also water that is lost through ground infiltration.
Sediment is carried by the Winooski River Drainage Basin in the forms of dissolved sediment and the suspended loads. With the limited data that is available it was determined that the TDS is 48.34 Mg/(km^2)yr and for the TSS, 47.89 Mg/(km^2)yr. The two sediment loads are similar in mass. When compared to the Cuban basin rates reported in the GSA Today, Winooski's sediment loads are much lower. The difference is understandable because of the different geographic location. Cuba is located in a tropical region that is tectonically active with active river channel systems. The uplift of Cuban topography allows for fresh rock to become exposed allowing for increased weathering which causes an increase of sediment in the river systems.
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