Watershed Delineation-Tobacco River
Watershed Delineation: Tobacco River
Will Tillmans
Water Resources Engineering CE3620
August 20, 2013 Table of Contents I. INTRODUCTION…………………………………………………………………………………………………………………………..3
II. PROCEDRE / METHODS……………………………………………………………………………………………………………....3
III. RESULTS……………………………………………………………………………………………………………………………………..6 a. Figure 1. Keweenaw County Land Use Map[2] 4 b. Figure 2. Tables 3.1 & 3.2 of Ungaged Watershed Document [3] 6 c. Table 1. RCN Value with Percentages of Soil and Land Use 7 d. Figure 3. Inflow Versus Outflow of the Tobacco River Watershed 9 e. Figure 4. Tobacco River ArcGIS Delineated Watershed 10
IV. DISCUSSION……………………………………………………………………………………………………………………………..10
V. CONCLUSIONS………………………………………………………………………………………………………………………....12
VI. REFERENCES…………………………………………………………………………………………………………………………....13
Abstract
This project looks at a select watershed in Michigan and how the various characteristics of that watershed affect runoff from predicted storms. The chosen watershed was the Tobacco River that flows into Lake Superior Tasks were performed to first delineate the watershed, calculate the soil and land use, use that data to predict a 100 year storm, and to delineate the watershed using ArcGIS. The area and the perimeter of the watershed varied greatly between the hand drawn delineation (260% error) and the ArcGIS because of missing a large tributary into Tobacco River that greatly expanded the area. Assuming the hand delineation was an ok representative of the watershed, the hydrologic model found the total abstraction to be 4.82 inches, a peak discharge of 217 cfs, and a basin lag time of 11 hours. Additional
Will Tillmans
Water Resources Engineering CE3620
August 20, 2013 Table of Contents I. INTRODUCTION…………………………………………………………………………………………………………………………..3
II. PROCEDRE / METHODS……………………………………………………………………………………………………………....3
III. RESULTS……………………………………………………………………………………………………………………………………..6 a. Figure 1. Keweenaw County Land Use Map[2] 4 b. Figure 2. Tables 3.1 & 3.2 of Ungaged Watershed Document [3] 6 c. Table 1. RCN Value with Percentages of Soil and Land Use 7 d. Figure 3. Inflow Versus Outflow of the Tobacco River Watershed 9 e. Figure 4. Tobacco River ArcGIS Delineated Watershed 10
IV. DISCUSSION……………………………………………………………………………………………………………………………..10
V. CONCLUSIONS………………………………………………………………………………………………………………………....12
VI. REFERENCES…………………………………………………………………………………………………………………………....13
Abstract
This project looks at a select watershed in Michigan and how the various characteristics of that watershed affect runoff from predicted storms. The chosen watershed was the Tobacco River that flows into Lake Superior Tasks were performed to first delineate the watershed, calculate the soil and land use, use that data to predict a 100 year storm, and to delineate the watershed using ArcGIS. The area and the perimeter of the watershed varied greatly between the hand drawn delineation (260% error) and the ArcGIS because of missing a large tributary into Tobacco River that greatly expanded the area. Assuming the hand delineation was an ok representative of the watershed, the hydrologic model found the total abstraction to be 4.82 inches, a peak discharge of 217 cfs, and a basin lag time of 11 hours. Additional
References: [2] MIRIS/MI Geographic Framework Base Data “Keweenaw County Zoning Map” February 14, 2007. http://www.keweenawcountyonline.org/docs/ZoningMap.pdf [3] Sorrell, Richard C., P.E