The Trempealeau Watershed, also known as HUC 07040005, covers a land area of 1,176 square miles in the western part of Wisconsin. The watershed is characterized by rolling hills, mixed deciduous forests, and agricultural lands. The Trempealeau River is the main hydrologic feature in the watershed, flowing into the Mississippi River. The watershed experiences a humid continental climate with cold winters and warm summers. Snow cover usually occurs from December to March, with an average snowpack depth of 15-20 inches. Surface water in the watershed is used for irrigation, fishing, and recreational activities. Reservoir constituents include sediment, nutrients, and contaminants from agricultural runoff. Interesting climatic trends in the watershed include an increase in precipitation and average temperature over the past few decades, leading to changes in streamflow patterns and water quality.