Drought Has Disappeared from Much of the U.S. : Image of the Day. Bioswales for Stormwater Management. Do you live in a community with expansive impermeable parking lots or on a street with dirt or grass along the sidewalk?
These designs are known for being ineffective at absorbing the runoff from rainstorms. Bioswales may be a viable solution for your area. Bioswales are used as an alternative to storm sewers and are becoming increasingly common in urban areas–alongside roads, sidewalks, and in parking lots. Bioswales (you might have a clearer picture if you think of them as ditches) capture water and allow it to undergo a natural filtration process right there, rather than heading to a storm sewer. As rain events occur, water “runs-off” impermeable surfaces like rock, asphalt, and concrete. Have a Bioswale to Map? In the toolshed, choose “second” for mapping a habitat. Native grasses, shrubs, and flowers are often used for bioswale projects. Bioswales are recommended to be a parabolic or trapezoidal shape with slopes no steeper than 3:1 (3 feet horizontal to 1 foot vertical). Science, Engineering & Technology. 556e2e59 2d5c 47c9 b108 d619ca2e331a. San Joaquin Valley is Still Sinking.
Since the 1920s, excessive pumping of groundwater at thousands of wells has caused land to subside, or sink, by as much as 8.5 meters (28 feet) in sections of California’s San Joaquin Valley.
This subsidence is exacerbated during droughts, when farmers rely heavily on groundwater to sustain one of the most productive agricultural regions in the United States. Subsidence is a serious and challenging concern for California’s water managers, putting state and federal aqueducts, levees, bridges and roads at risk of damage. Already, long-term land subsidence has damaged thousands of public and private groundwater wells throughout the San Joaquin Valley.
Furthermore, the subsidence can permanently reduce the storage capacity of underground aquifers, threatening future water supplies. It’s also expensive. Several trouble spots that were identified in 2015 have continued to subside at rates as high as 0.6 meters (2 feet) per year. Drinking Water & Ground Water Kids' Stuff. Building a Model Aquifer PDF (2pp, 256K) - Step by step instruction on building your own aquifer.
Resource Management: Protecting your Drinking Water PDF (2pp, 176K) - This activity will help you estimate your ground water vunerability. Decision Making - A Mock Town Meeting on a Proposed Tank Farm PDF (2pp, 208K) - Your class will represent all of the citizens of Priceford. A major corporation wants permission to build a tank farm just outside of the town and both sides must be heard at a town meeting in your class. Water Filtration PDF (2pp, 186K) - A class activity to demonstrate the procedures that municipal water plants may use to purify water for drinking. Interactive Water Filtration Instructions * - A step-by-step instruction on how to complete this in class activity complete with narration and visual support. Question & Answer Game PDF (2pp, 128K) - A card game that you can print and cut apart the individual cards.
Strokkur Geyser in Iceland - EPOD - a service of USRA. Photographer: Jim BuckoSummary Authors: Jim Bucko; Jim Foster Shown above is the Strokkur geyser in the southwest of Iceland.
The word geyser is from the Old Norse meaning to rush forward or gush. Strokkur erupts up to a height of 100 ft (almost 30 m) about every 10 minutes or so as groundwater is heated by geothermal activity to 257 F (125 C), at approximately 65 ft (20 m) below the surface. However, this groundwater isn't immediately ejected but is rather constricted by overlying rock and the weight of the water column itself until a critical pressure is reached enabling the column to erupt at the surface. Photo taken on September 10, 2016. Photo Details: Camera Model: Canon PowerShot SD1200 IS; Focal Length: 6.2mm; Aperture: ƒ/8.0; Exposure Time: 0.0031 s (1/320); ISO equiv: 80. Water Cycle - Earthguide Animated Diagram.
Groundwater - flash animated diagram. Cave Conundrum. Aquifer in a tank, An Earth-Science Experiment. Bureau of Economic Geology Lab 1: Aquifer Model in a Tank Contents This simple model is intended for student inquiry into ground-water systems.
Have your students try things (within the context of the model), observe what happens, and record and interpret their observations. After this inquiry they will better understand aquifers and the issues of climate, spring flow, environmental protection, and water use that are so hotly debated in Austin and elsewhere in Texas. The model can be productively used in the context of process TEKS (4.3) and (5.3) to "represent the natural world using models and identify their limitations" and concept TEKS (5.5) describing groundwater as part of the water cycle; (5.11) renewable resources, (6.14) groundwater and surface water relationships. Vocabulary Recharge Discharge (spring, well) Aquifer Vadose zone Water table Materials 10-gallon tank PVC pipe with holes drilled to serve as screen interval.