QUESTION Storm drains, destruction of vegetation, and impervious rooftops and pa
ID: 286501 • Letter: Q
Question
QUESTION Storm drains, destruction of vegetation, and impervious rooftops and parking lots in a national park could result in what? A larger volume and faster rate of discharge than in less developed watersheds, often resulting in more frequent and intense flooding including flash flooding Increased contaminants and silt in streams Decrease in evapotranspiration Decrease in infiltration All of the above QUESTION 6 Most national parks contain streams or rivers that are monitored for several characteristics. What does a hydrograph depict? Stream level (elevation) versus discharge O Stream discharge versus time A graphic depiction of how often certain magnitude floods occur The history of flooding events for a particular stream that enables planners to predict flood frequency over a period of years Evapotranspiration versus infiltration rates for a watershed QUESTION 7 Post-wildfire runoff and sediment can have immediate impacts on water quality and existing channel features in a stream in a national park. These impacts are usually: Always adverse Always positive Possibly both positive and negativeExplanation / Answer
Q.5 All of the above.
Storms can cause heavy flow of water in a small time period. Vegetation reduces the speed of this flowing water and water gets absorbed into the soil.
If there would be no top soil, less vegetation and impervious roof tops and parking lots, then there would be no space for this water to infilterate and it will flow on the surface causing flash floods, silt in streams, reduced evapotranpiration due to lesser vegetation and decreased infiltration.
Q.6 A hydrograph depicts rate of stream discharge versus time. It shows how water flows in a river in response to a rainfall event. The general units used for water flow are cubic feet or cubic meter of water per second.
Q. 7 Post-wildlife runoff and sediments usually have adverse effects on the water quality and aquatic life. A large amount of silt can cause turbidity in water thus reducing sunlight penetration. This situtation causes reduced photsynthesis in aquatic plants and thus reduced productivity in the system.Silt also causes water pollution, making water consumption harmful for animals. Silt also reduces the depth of rivers, which causes flahs floods in streams at the time of high water flow.
Q. 8 The most amount of fresh water is found in ice caps and glaciers in greenland and Antarctica. About 99% of freshwater ice is found in these two places. 65 % of total fresh water is found in glaciers and ice sheets.
Q.9 All of the above.
Hudrofracking or hydro fractruring is a technique used to extract oil and gas from deep wells. In this process, first a well is dug into the upper layers of earth. Then fracking fluid is pumped into the well to break the rocks so that the oil and gas can flow out of the well.
But this practice causes huge environmental detereoration in natural areas. It causes differnet harms like
Water quality detereoration: A large part of water that flows into the well comes back and contains harmful substances which cause water pollution.
Earth quakes and landslides: Because inner rock layers become weak and storm water and floods further weakens them causing quakes and landslides.
Heavy machinery and vehicles, human intereferences cause light and noise pollution in national parks.
Q.10 Invasive or alien species are those which belong to some other area, and when they are introduced to some other place which has suitable environment for them and has no natural predators, then they grow very rapidly and starts threatning other native species.
Quagg mussel is a freshwater mollusk native to Europe. Scientists are positive that it can establish itself to a degree that can cause major ecological changes in the Grand Canyon Natioan Park.