WSU's Low Impact Development Research Center: Progress Photos

The monitoring stations, borrowed from Seattle Public Utilities, will help WSU researchers monitor the quantity and quality of stormwater runoff from the various permeable pavements, including porous asphalt to the left and porous concrete to the right.

The testing equipment inside the monitoring station.

The first raingardens were planted with four types of grasses and this treatment was duplicated four times so that the evaluation could be replicated. One grass did not take and will need to be replanted.

The top of the mesocosm testing cells. These cells will be filled with various types of biorentention media to evaluate the pollutant removal from stormwater without the assistance of vegetation.

WSU’s Curtis Hinman explains the soil mesocosms. While the raingardens are designed to test different planting combinations, these soil columns are used to test different soil gradations. Stormwater will flow from the rainwater cisterns (green tanks behind the group) through the mesocosm into the sampling box located in the mesocosm gallery.

Looking down the mesocosm gallery.