in a material that holds groundwater, porosity

The rate of groundwater flow is determined by a variety of factors, including porosity, permeability, aquifer gradient and outflow of the aquifer system. a) artesian Dead-end pores are only likely to impact the magnitude of the effective porosity when their volume makes up a significant portion of the sample. (Source: Environment Canada) c) drinking water The definition of hydraulic conductivity (usually denoted "K" in hydrology formulas) is the rate at which water moves through material. a) along the equator The amount of water that a rock can store depends on its porosity, which is the proportion of the volume of the rock that consists of pores: The principal factors that control porosity are grain size and shape, the degree of sorting (a well-sorted sediment has a narrow range of grain size), the extent to which cement occupies the pore spaces of grains and the amount of fracturing. Ideally, sample structure, the degree of compaction, particle packing, and density would be representative of field conditions, which is referred to as an undisturbed sample. a) 1 mill a) curly crystals of frost that form early in the morning What is a possible way to increase permeability? d) the # of protons and neutrons, Orange County receives most of its drinking water from? a) the tendency of the continents on a spinning globe to be thrown outward b) the presence of coral reefs on land Water in the saturated groundwater system moves slowly and may eventually discharge into streams, lakes, and oceans. permanent - can stop it but not undo it, 1. pesticides and herbicides e) poorly sorted sand, silt, and clay, In a material that holds groundwater, porosity: e) weather it is a permanent or ephemeral stream, d) the velocity and turbulence of the current, which of the following features are generally not associated with mountain streams and rivers? The volume of water needed to saturate the sample is then divided by the sample volume to determine the effective porosity (Equation 6). b) past changes in climate The amount of water a material can hold is directly related to the porosity since water will try and fill the empty spaces in a material. d) a line that separates the tree from the grasslands on the shaded relief maps. The water content in the soil at saturation is equal to the percent porosity . d. HCl\mathrm{HCl}HCl is more soluble in water than in CCl4\mathrm{CCl}_4CCl4. c.Given similar degrees of sorting, how does porosity vary with the roundness of the grains? reduces the water table (lower in the ground), 1955- 1977 (22 yrs) lost 30 feet of land - yearly average 30/22, less room to store ground water - permanent This determines how easy it is for water to flow from one pore to the next. The soil moisture content can also be expressed in percent of volume. c) beach along and ocean or lake a) Florida, North Carolina, South Carolina c) counterclockwise in the northern hemisphere c) under normal conditions of burial and heating Even so, the packing arrangement will differ, and thus laboratory measurements using recompacted samples provide only approximations of the field effective porosity values. b) quartz does not weather and so it keeps the granite from weathering e) all types can generate earthquakes, What type of seismic wave can pass through liquid? D. all of the above Which of the following is true about how a lake can relate to the water table? c) the # of electrons in the outer shell BSc (Honours) Geography and Environmental Science. e) a and b only, The Earth's magnetic field is generated by: After dissolution, porosity was greater than before dissolution, increasing by 0.140%, 0.038%, 0.042%, and 0.126%, respectively . The amount of water held between field capacity and permanent wilting . c) hardness a) shale b.Which are more porous well-sorted sediments or poorly sorted sediments? The cement in consolidated sedimentary rocks occupies what would otherwise be spaces between the grains, so a cemented sandstone, for example, will be less porous than a loose sand with grains of similar size. b) salt deposits that formed early in Earth's history become dissolved by modern oceans In a material that holds groundwater, porosity: controls the amount of water that can be stored, determines the composition of the cement between grains and clasts, does not depend on the size and shape of grains and clasts, is constant from one type of material to another. c) rock vanish a) mid-ocean ridges Two important factors help determine how good an aquifer is: Uploaded on Oct 30, 2014 Dorian Phelps + Follow water water table confined aquifers saturated zone lowered water table characteristics found in all good aquifers. a) the Colorado river Groundwater typically flows through limestones by way of cracks. e) all of the above are source of material in soil, e) all of the above are source of material in soil, what is the main force involved in the stability of slopes? effects of excess pumping of fresh water wells in coastal area, well could start yielding useless salt water, lowering of the water table around a pumping well d) all the rocks were deposited with the oldest on the bottom, Mid-ocean ridges are higher than surrounding oceanic crust primarily because: Sign up for our regular newsletter to get updates about our new free courses, interactives, videos and topical content on OpenLearn. b) have different types of geological hazards Porosity is more associated with storage of water, while permeability is more associated with groundwater movement and flow. d) dry wash b)tar sands Table 2 provides an example of the ranges of values of total porosity and effective porosity for a variety of materials. b) rapids 27 febrero, 2023 . usually hidden (more arid (hot) deeper, region between ground surface and water table d) south America rifted apart from Africa b. HF\mathrm{HF}HF will have a lower vapor pressure at 50C-50^{\circ} \mathrm{C}50C than HBr\mathrm{HBr}HBr. Hydrogeology (hydro-meaning water, and -geology meaning the study of the Earth) is the area of geology that deals with the distribution and movement of groundwater in the soil and rocks of the Earth's crust (commonly in aquifers).The terms groundwater hydrology, geohydrology, and hydrogeology are often used interchangeably.. Hydrogeology is the study of the laws governing the movement of . a) Hawaii a) mountain ranges intercept wind and water affecting rainfall amounts Groundwater is used for drinking water by more than 50 percent of the people in the United States, including almost everyone who lives in rural areas. a) adding water to a slope Want to achieve your ambition? a) a change in mineral comp e) all of the above are ways fossils can be preserved, e) all of the above are ways fossils can be preserved, To what does the term evolution refer? Porosity is a description of how much space there could be to hold water under the ground, and permeability describes how those pores are shaped and interconnected. The Open University is authorised and regulated by the Financial Conduct Authority in relation to its secondary activity of credit broking. e) a rock formed from a coral reef, which of the following is not involved in turning some sediments into sedimentary rock? a) ductile behavior C. It has the capacity to store large amounts of water. a) centrifugal force that causes water to bulge along the poles c) Delaware, Maryland less water - lower land a) when weakening of an ocean current results in cooler sea temp in the eastern pacific Porosity depends on both soil texture and structure. 35. c) dolostone d) the lower parts of the glacier flows faster that the upper part, d) the lower parts of the glacier flows faster that the upper part, which of the following is not a type of evidence left behind by glaciers? In some permeable materials groundwater may move several meters in a day; in other places, it moves only a few centimeters in a century. 36. a) the amount of precipitation on land e) all of the above, d) water is pulled by gravity of the moons, which source of drinking water is most likely to be pure and safe to drink? Permeability For groundwater to be able to get into a rock with good porosity it must also have good permeability. e) a wide range in the size of clasts, which of the following places would not be a good place to visit a reef? Types of Aquifers 3. d) all of the above d) water cannot erode unless it is carrying sediment a fossils indicate that a sediment was deposited on land In a material that holds groundwater, porosity. c) convergent b) turbulence of the water is less important than the temp, which affects viscosity a) mid-ocean ridges b) melting and solidification a) there are more pieces but the surface area does not change The initial porosity of carbonate rock significantly affected the increase in dissolution-induced porosity. d.Porosity in Figures 14a to d are, respectively, 30-40%, 20-30%, 10-20%, less than 10%. b) thermal expansion d) rock slide d circulation directions are not systematic Water contained under the ground's surface, located in the spaces between soil particles and in the cracks of sand, gravel, and rock; a natural resource and source of water for drinking, irrigation, recreation, and industry. b) the fault suddenly uplifts or downdrops the seafloor d) migration of deserts and advances of the sea In most cases, total porosity values reported for uncemented granular material and rocks with well-connected pores (e.g., sandstones) and fractures can be used to represent effective porosity. c) ground water The volume of water that fills the void spaces is assumed to represent the volume available to flowing groundwater, VI. b) coarse granite d) a change in climate of the region In a material that holds groundwater porosity a. d) are composed of lava flows, pyroclastic material, and mudflows d) all of the above Here is a sample run of the program: Which of the following statements is(are)* true*? Drag each planet into its proper position in the Solar System from top, closest to the Sun, to bottom, farthest. D. It absorbs most of the water it contains from rivers. OpenLearn works with other organisations by providing free courses and resources that support our mission of opening up educational opportunities to more people in more places. a) a spreading center to a transform fault 5. collapses pore space and e) open ocean away from land, if a rock is poorly sorted, this means the rock contains: In most cases, total porosity values reported for uncemented granular material and rocks with wellconnected pores and fractures can be used to represent effective porosity. 7. pore collapse. The porosity of rocks describes the rocks' capacity to hold water. Porosity and Permeability. a) liquid water d) meteorites, According to the rock cycle, sediment that is being transported by a river could become a metamorphic rock after: Uploaded By ms382587; Pages 62 Ratings 95% (19) 18 out of 19 people found this document helpful; b) igneous d) gray granite d) all of the above . Porosity is the percent of open spaces or voids within a volume of soil or rock. d) uncompacted clay which of the following is a good interpretation of the environmental significance of an attribute of a sedimentary rock? 34. c) glaciers depress the land surface which pulls sea level down with it d) prevailing wind direction Which of the following is NOT true about the unsaturated zone? At the scale of laboratory investigations, careful attention to the conditions of the porous sample is required. e) shallow, clear waters off Iceland, which of the following can we understand by studying sedimentary rocks? b) mountain belt or island arc The speed of flow in rocks is extremely slow in comparison with surface flow, even for rocks with high hydraulic conductivities. -the amount of rainfall 1. the number of conduits or pathways between pore spaces, layer that separates a water resource (aquifer) in the earth so that the water can't get through it, groundwater that is accessible as a water resource, A material of low porosity and permeability that greatly slows the movement of ground water, A body of rock that will not transmit water at all, The boundary (top) of the saturated zone of groundwater and the unsaturated zone, top of the groundwater system b) water within the pan flows in a circular path Unconsolidated sediments with rounded grains of uniform size (i.e. Porosity can be referred to or considered as the ability of the water to penetrate through the pores contained inside a rock, and the . 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