Environmental Specialists at OJA
A big THANK YOU to Kathryn Campbell, Lori Davis and Sooleeya Sihakhom, of KCI, who provided a construction and environmental protection presentation to Mrs. Braga’s 4th Graders, December 10, which aligned with their science curriculum covering the topic of erosion.
Students were well prepared for their guests having already worked in study groups creating their own diagrams on: Types of Soil, Fossils and Erosion.
Led by the guest speakers, students got to “dig deeper”, learning that water erosion is caused by three types: rill (little trickles of water), gullies (big water run-off) and sheet erosion (water resting flat on the ground like a sheet over a bed). Students learned that natural erosion occurs over many many years, i.e. The Grand Canyon, whereas man-made changes, like on a construction site, could cause a new pond to form in a matter of just three weeks, thus the need for figuring out erosion control methods.
Students were introduced to the concept of Best Practice Management and got to play the part of “environmental protection inspectors”. They did this by viewing photos, spotting the problem, and then determining whether to use silt fences, rumble racks or vegetation buffers to achieve the desired goal of keeping original sand and soil on a site.
Upon leaving the classroom, students walked across the street to the future site of the Kitchen House and Garden, where they observed the recently installed silt fence and discovered OJA’s own inlet. Students also learned the reason for “No Dumping” signs and will be quick to tell you, for our environmental protection, its “Only rain down the drain”! In other words, motor oil or grass clippings dumped in inlets/drains end up in our lakes, streams and rivers—and that’s not good.
To explore further with your kids, go to YouTube’s, FunScienceDemos—Erosion and Soil.