Utilizing and Understanding the New Withdrawal Tool The New Withdrawal Tool is a key element of the WWAT System. It allows the user to estimate the likely impact of a proposed water withdrawal on nearby streams. There are many parameters that must be addressed before the tool can calculate the impact of the new withdrawal. These parameters will influence the results of the withdrawal tool a great deal, so it is important that they are filled out correctly. Entering Withdrawal Information: To begin a new water withdrawal scenario, click on the New Withdrawal button. Find the location of your watershed withdrawal site on the map and click there. A new webpage window will open up and present you with several options to fill out. The information that needs to be filled out first is the pumping source and frequency. Under withdrawal source, you will see three options: Surface Water, Ground Water, and Shallow Pond. Withdrawal Source: Choose the source that you would like to take water from and click the bubble to the left of that type. If you selected Surface Water (from stream) as your withdrawal source move on to Pumping parameters. If you selected Groundwater or Shallow Pond as your withdrawal source, you will need to decide whether the withdrawal will be continuous or intermittent before moving on to Pumping Parameters. It is important to note that if you choose intermittent for your water withdrawal, you will need to fill out a pumping schedule. This schedule appears below the Pumping Parameters section. Pumping Parameters: This section is where you set the pumping specifications for your withdrawal location. However, it is important to note that the Withdrawal tool automatically recommends sample information for your withdrawal location. For example, the Coordinates, Well depth, and Aquifer type are automatically determined by the Withdrawal tool based on information previously known about your location site. Pumping Capacity (GPM): Decide how many gallons per minute you want to pump at your site. Coordinates(X,Y): Already Given. Well Depth (FT): How many feet deep the well will be. Aquifer type: Describes what type of aquifer you are pumping water from. There are two types of aquifers, Bedrock and Glacial. Bedrock aquifers are geologic bedrock units that have porosity and permeability so that water can be extracted at a productive rate. Water in bedrock aquifers is located in the spaces between the rock grains and solid rock fractures. Glacial aquifers are formations that were deposited by the glaciers during the last ice age. They are composed of mixtures of sand, gravel, clay, and till materials that are deposited in various configurations and thicknesses. The water that is held within these formations can occur close to the surface or they may be more than 150 meters deep. Current Stats at Location: This window displays the current statistics for your chosen withdrawal location. It is a quick summary of what the norm is for that area. Intermittent Pumping Schedule (Optional): This option appears only if you chose intermittent as your pumping frequency. For the pumping schedule, determine how many hours, days per week, and months of the year you want to pump. Review Selections: Once you are satisfied with the information you’ve submitted, click on the “Send to Model” button located on the bottom right side of the page. The webpage will open up with the Water Withdrawal Screening Process Results Page