warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /home/drupal/drupal/sites/udel.edu.environmentalportal/themes/enviro-theme/ud-footer.php on line 7.

Ph.D. student studies stemflow in urban forests

Nov. 13, 2015--Asia Dowtin, a doctoral candidate in the University of Delaware Department of Geography’s ecohydrology group, led by professor Delphis Levia, is studying how water and nutrients are transported from the tree canopy to the soil below.

Forests cover approximately 30 percent of the Earth’s surface. They play an important role in purifying air, preventing soil erosion and maintaining proper balance in water resources. How rain makes its way into a forest’s soil can affect soil chemistry, groundwater recharge and, ultimately, forest health and productivity.

Dowtin is particularly interested in how stemflow — water that travels down tree trunks or plant stems — is generated in urban forests like those located in the city of Wilmington’s Rockford Park, Delaware Art Museum and Alapocas Run State Park.

Urban areas contain high concentrations of impervious surfaces such as rooftops, roads and concrete that prevent rainwater from permeating into the soil. During rainstorms, this can cause rainwater to pool on surfaces leading to flash flooding, combined sewer overflow and overall water management headaches for city dwellers and city water management workers. 

Read more (with video) >>