UK winter storms 20 February 2014Last updated at 08:14 ET January's wet weather in numbers Slow threat of groundwater flooding The reasons behind one of the stormiest months Turbulent seas and wave watchers being caught out Aerial imagery and photos along the Thames Eyewitness accounts from storm-hit areas The Army moves in for a "rapid inspection" of flood defences The impact of the floods on wildlife How bad are 2014's floods compared with 2007? Water cycle As the Earth's surface water evaporates, winds move water in the air from the sea to the land, increasing the amount of fresh water on land. Water vapor is converted to clouds that bring fresh water to land in the form of rain or snow. Precipitation falls on the ground, but what happens to that water depends greatly on the geography of the land at any particular place. The water cycle involves the exchange of energy, which leads to temperature changes. The evaporative phase of the cycle purifies water which then replenishes the land with freshwater. Description[edit] Processes[edit] Many different processes lead to movements and phase changes in water Condensed water vapor that falls to the Earth's surface . The precipitation that is intercepted by plant foliage, eventually evaporates back to the atmosphere rather than falling to the ground. Snowmelt The runoff produced by melting snow. The variety of ways by which water moves across the land. Subsurface flow Evaporation Advection Condensation
River Landforms - The British Geographer River Landforms Changing River Profiles Changing River Profile Before looking at specific river landforms it is important to look at how the river channel itself changes downstream. We have already looked at how the river channel in the upper course is shallow and narrow with large bedload that disrupts the efficiency of flow. Upper Course Landforms V-shaped Valleys and Interlocking SpursRivers are constanlty modifying their channel and surrounding landscape. 2012 CLEO (Cumbria and Lancashire Education Online) Finally, and very briefly, it is important to understand that the size and scale of v-shaped valleys with their characteristic interlocking spurs reflects the maturity of the landscape. Potholes Potholes form mainly in the upper course of the river, in high altitude where the river channel cuts directly into the bedrock. Wind turbulence over a building similar to river eddie development Rapids Waterfalls Variations in Waterfalls Source: GP Network, Beautiful Places Braided Channels Levées
The Water Cycle [in Spanish] © Contributed by Leanne Guenther Run and get a glass of water and put it on the table next to you. Take a good long look at the water. Now -- can you guess how old it is? The water in your glass may have fallen from the sky as rain just last week, but the water itself has been around pretty much as long as the earth has! When the first fish crawled out of the ocean onto the land, your glass of water was part of that ocean. And you thought your parents were OLD The earth has a limited amount of water. This cycle is made up of a few main parts: evaporation (and transpiration) condensation precipitation collection Evaporation: Evaporation is when the sun heats up water in rivers or lakes or the ocean and turns it into vapor or steam. Do plants sweat? Well, sort of.... Condensation: Water vapor in the air gets cold and changes back into liquid, forming clouds. You can see the same sort of thing at home... Precipitation: Collection: Water Cycle Activity Pages. Sheet 1 - (color) or (B&W)
Changing Channel characteristsics Width and depth are simple variables and generally increase downstream as more water is added from tributaries. Width can be derived either from the water surface width (occupied channel width) or from measuring from bank to bank, giving the bank full width. We can calculate the stream order from source to mouth too, and this gives us an indication of the size and shape of river channels. The stream order is calculated as follows; Stream order 1 streams have NO tributaries feeding into them, they are the original streams that start at springs up in the source. Stream order 2 streams occur where two stream order 1 rivers come together at a confluence Stream order 3 streams occur where two stream order 2 rivers come together at a confluence (not a stream order 2 with a 1, it must be the SAME stream order meeting) The stream order continues like this. Wetted Perimeter is the measure of how much water contact there is with the bed and the banks of a river. Source
Water Cycle and Water for Kids What is the Water Cycle? The Water Cycle (also known as the hydrologic cycle) is the journey water takes as it circulates from the land to the sky and back again. Interactive Game Can you put all the labels in the right places? The story of the Water Cycle Why do we need the water cycle? The Earth is covered by water, however, almost 97% is salt water found in the oceans. How many processes make up the water cycle? There are six important processes that make up the water cycle. Condensation - the opposite of evaporation. Big Dams: Boon or Bane? The Mekong River arises in the Tibetan Plateau of southern China and descends through a series of spectacular gorges into Laos, Cambodia, and Vietnam. The lower river widens into vast marshlands and deltas, upon which hundreds of thousands of people depend for their livelihood. Multiple dam projects, some completed, some under construction, and others planned, are dramatically changing the face of the river. The DON SAHONG DAM is under construction in Laos, just north of the Cambodian border, one of nine Mekong dams planned by the Laotian government. The XAYABURI DAM in northern Laos is in the latter stages of completion. These and other dams on the upper Mekong dramatically reduce the flow of sediments to the Tonle Sap wetlands in Cambodia and the Mekong Delta in Vietnam. Traveling up the Mekong, the JINGHONG DAM, built to provide hydroelectric power, is the first in an expanding system of Chinese dams.
The Water Cycle Introduction Precipitation, evaporation, and transpiration are all terms that sound familiar, yet may not mean much to you. They are all part of the water cycle, a complex process that not only gives us water to drink, fish to eat, but also weather patterns that help grow our crops. Water is an integral part of life on this planet. Only about 3% of Earth's water is fresh. The Watercycle The Watercycle The Water Cycle (also known as the hydrologic cycle) is the journey water takes as it circulates from the land to the sky and back again. The Sun's heat provides energy to evaporate water from the Earth's surface (oceans, lakes, etc.). Plants also lose water to the air (this is called transpiration). WHY ARE THE OCEANS SALTY? Web Links On the Water Cycle and the Oceans Enchanted Learning®Over 35,000 Web PagesSample Pages for Prospective Subscribers, or click below Click to read our Privacy Policy E-mail Advertisement. Copyright ©2000 EnchantedLearning.com ------ How to cite a web page
Water Education Foundation Did you know that the water you drank this morning might have been the same water a dinosaur drank millions of years ago? Or it may have been the same water that supported Columbus' ships on the sea. There is the same amount of water on Earth today as there has always been. The water keeps moving around in an endless cycle called the water cycle. Water itself is the only substance that exists in liquid, gas and solid form - the keys to the water cycle. Water evaporates from oceans, rivers and lakes (water in its liquid form) and rises into the atmosphere (water in its gas form) where it condenses to form clouds. top Of all the water on Earth, only a small amount is available for us to use. 97.2% of the Earth's water supply is salt water. Of the total supply of water on Earth, 0.6% is groundwater (we can use some of this water) 0.01% is in lakes and streams (we can use some of this water) 2.2% is in glaciers and icecaps 0.001% is water vapor Brush your teeth?
The Water Cycle © 2012 Clipart.com Purpose To help students understand the continuous cycle that water undergoes as it changes form. Context In this lesson, students build upon their previous investigations of water—and its different forms—by learning about the water cycle and its continuous flow around us. In general, students at this level should already have an understanding of the following benchmark ideas: some events in nature have a repeating pattern—such as daily weather patterns or changes in temperature and the appearance of rain and snow at different times of the year; water can be a liquid or a solid and can go back and forth from one form to the other; and water left in an open container disappears, but water in a closed container does not disappear. This lesson furthers what students know about the connection between liquid and solid forms of water, in addition to helping them recognize that water can also be a gas, which is much more difficult at this level. Planning Ahead Motivation
Lesson Plan - Create a Water Cycle Make a mini water cycle! We know that water can be a liquid, a gas, or a solid. Outside, water is always changing from liquid to gas and back again. This process is called the water cycle. The Water Cycle The sun's heat causes water to evaporate from streams, lakes, rivers, and oceans. Create Your Own You will need: a large metal or plastic bowl a pitcher or bucket a sheet of clear plastic wrap a dry ceramic mug (like a coffee mug) a long piece of string or large rubber band water Put the bowl in a sunny place outside. The "mist" that forms on the plastic wrap will change into larger drops of water that will begin to drip. This experiment adapted from resources provided by the Monroe County Water Authority - C·R·E·A·T·E for Mississippi >> Classroom Resouces >> Lesson Plans >> The Water Cycle The Water Cycle Subject Area: Science Grade Level(s): 6 Duration of Activity: 2 to 3 class periods Description of Activity: In this activity students will recognize that a water cycle is a repeated pattern of change. Objectives: Identify the four parts of the water cycle: condensation, evaporation, precipitation and transpiration. Materials/Equipment: Microsoft Paint software program. Prerequisites (skills or background needed): The students need knowledge of what is meant by cycles, changes and clouds. Procedure Teacher Component: The teacher will discuss definitions of vocabulary terms: condensation, evaporation, precipitation and transpiration, cycles, changes, cloud and water vapor. have students form hypotheses about the following questions and write the answers in their science notebooks: Why does a bathroom mirror "fog up"? Student Activities: The student will Accommodations: Extension Activities: Integration: Language Arts Technology Art Assessments: URLs: Curriculum Frameworks TerraNova: