Even 10 years ago, he said, if staff at the ski hill needed a ditch, they'd dig a ditch and put in a culvert to drain it, which isn't very effective. Erosion took its toll over the years, dirtying the Poplar. Watershed studies estimate a third of the erosion to be human-induced, with the rest coming from natural causes. Fixes: It turned out that humans could aid the river by addressing both the human-caused and natural erosion. Step one was moving the Poplar away from the "megaslump" — an area where the river butts against a high dirt bank, which is considered the largest contributor of sediment — and installing a tree and rock buffers to keep dirt out.
Lutsen changed how it built ski runs, too. Now, workers preserve the existing topsoil as much as possible when constructing new runs to retain its permeability, Rider said. Lutsen also uses waterbars on ski runs, which divert water runoff into wooded areas or into a stormwater reservoir rather than running down into the river.
Impact: Largely, it's an attitude change. Larson summed up important lesson to learn when it comes to development around water: "Humans can't not make an impact. The federal Environmental Protection Agency will make the final call whether Fulda and the Poplar officially come off the impaired waters list. Regardless, the health of both water bodies is improving. We'd like to know. Founded in , the Chesapeake Bay Foundation CBF is the largest independent conservation organization dedicated solely to saving the Bay.
Oils, anti-freeze, paint, solvents, cleaners, preservatives, and prescription drugs should not be poured down a household or storm drain. Check with your county waste management service to find out what hazardous materials they accept. Reduce or eliminate use of fertilizers and chemical herbicides and pesticides.
Learn to live with a dandelion or two. Lawn fertilizers and chemicals are a big source of nitrogen and phosphorus pollution and toxic runoff. Make an appointment to service your septic system. Septic systems should be inspected yearly to ensure proper functioning. Waste from failing systems can leak into the groundwater and eventually end up in local waterways and the Bay.
Landscape with native plants. Bay-friendly landscaping reduces stormwater runoff. Consider involving and educating your community by using Bay-friendly landscaping on community property near your home. Find out more about gardening with native plants. Eliminate bare spots in your yard. Bare spots are places where vegetation such as plants, shrubs, grasses, flowers no longer exists in the soil.
The outcome of having any type of bare spot is the same: stormwater hits the ground and is not able to soak in to the soil. Use our step-by-step guide to fix the bare spots in your school or home yard. Make a rain garden. This electrochemical membrane not only filters water but also acts as an electrode. Chemical reactions happening on such a charged membrane can turn nitrates — a pollutant — into nitrogen gas.
Or the membrane might split water molecules, generating reactive ions that can kill infectious microbes in the water. The reactions also prevent particles from sticking to the membrane.
Large carbon-based chemicals, such as benzene, now become smaller and less harmful. In lab tests, these new membranes were successful in filtering out and destroying pollutants, Chaplin says. In one test, a membrane transformed 67 percent of the nitrates into other molecules. He and colleagues reported their results last July in Environmental Science and Technology.
Chaplin expects to move the membrane into pilot tests within the next two years. Industrial chemicals known as PFAs present two challenges. Only the larger ones are effectively removed by activated carbon, the filtering substance in many household water filters. Smaller molecules will remain in the water, notes Christopher Higgins. After all, once removed, they still are hard to break down for safe disposal.
First, they use a specialized filter with tiny holes to grab the molecules out of the water. Then they add sulfite to the concentrated mix of PFAs. When later hit with ultraviolet light, the sulfite generates reactive electrons. These break down the tough carbon-fluorine bonds in the PFA molecules. Cleaning up those sites would remove the pollutants before they could be used to feed wells or city water systems. By Laurel Hamers November 29, at am. David Reckhow and his colleagues at UMass Amherst turned an old building into a new lab.
Yamuna also did not show any improvement during the monsoon. The quality of river is not even fit for outdoor bathing. The quality of river is poorer in in comparison to and The Central government is supplementing the efforts of the states to reduce pollution in Yamuna by providing financial assistance to Haryana, Delhi and Uttar Pradesh in a phased manner.
Accordingly, the Delhi Jal Board that looks after water and sanitation of the city, has submitted a priority list of projects amounting to Rs 1, crore to be taken up under Phase I of Maily Se Nirmal Yamuna Revitalisation Plan, These were the first two agreements with private sector companies to build STPs under an innovative PPP called hybrid-annuity payment model that the government formulated with the help of the International Finance Corporation.
Need of the hour Only having a large number of sewerage projects and STPs will not clean the rivers. In any case incomplete sewage networks, designed without a specific plan for pollution control, do not clean rivers. Most of the sewerage projects are centralised systems conveyed through pipelines and pumping stations to an STP, where it is supposed to be treated and disposed off. Very little thought is given to the re-use of treated effluents from these STPs.
Most of it mixes with untreated effluents from colonies not connected to the sewerage network. The root problems are both programmes—river-cleaning and city infrastructure—remain hardware-driven and marked by poor understanding of the water-sewage situation. In October , the Centre planned to move from hardware focus to bioremediation technologies for cleaning Ganga at 54 new sites.
In-situ treatment is simple and easy-to-operate and does not require major modification of the drain, said a note from MOWR.
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