Bankfull Discharge Lab Report

The results shows us that the hypothesis between the river Loughton brook and the erosion shows that it gets wider and deeper due to many reasons such as vertical erosion, lateral erosion, hydraulic action and abrasion of rocks.

There are six different types of water erosion: splash erosion, sheet erosion, rill erosion, gully erosion, valley or stream erosion, and bank erosion. Splash erosion is when raindrops hit soil and small soil particles are displaced. Sheet erosion is when raindrops remove soil in thin layers. During rill erosion, small concentrated flow paths are created. “These paths create a sediment source and delivery system for hillslope erosion. Areas where precipitation rates exceed soil infiltration rates are more prone to this type of erosion. During gully erosion, water flows in narrow channels during or after heavy rains or melting snow. The gullies can erode to considerable depths. Valley or stream erosion is created by water flowing alongside land. It extends downward, deepening a valley, and extending the valley into the hillside. This occurs more frequently

1. Rosemary Lane told the healthcare professional that she has been suffering from a headache with pressure above her eyebrows and a low grade fever for the past four days. This is known as _______________.

Jr, R. H. (2014, April 28). Encylopedia Britannica. Retrieved from Rio Grand River, United States-Mexico: http://www.britannica.com/EBchecked/topic/504243/Rio-Grande

The Ellicott City flood was destructive because it was on a high gradient stream. The high gradient stream made it flood faster, and had low stream discharge. Discharge is cross section of stream channel. It was also capable of moving large particles, which is an example of deposition and erosion. In the experiment, the ‘Main Street Ellicott City’ stream was more affected than the Meandering Stream. The Main Street Ellicott City stream was flooded faster, and more houses and cars were destroyed compared to the Meandering

The levee system has disrupted the natural deposits that are left from the overflow of the river.2

For example. Waterfalls and potholes are commonly found in the upper course, and are exceedingly rare in the lower course. Meanders and Oxbow lakes are commonly found in the middle course, it is caused by erosion and deposition, these factors causes the river to have a bend during its course. Levees and flood plains are also frequently found in the lower course, there is a larger water volume, therefore floodplains are created to adapt to it’s new features, while features such as meanders will not be affective, as it has a higher chance of flood, and erosion would also change the feature very

Our sites (Figure 1.) were spread along the lowest reach of Merri Creek before it runs into the Yarra River. As a direct result of this there is an extensive valley from the constant presence of fluvial processes over geological time. The landform patterns at our sites were extensively governed by the movement and availability of water, with escarpments, gullies, cliffs and spurs of varying steepness all observed.

Relationships of rocks and their qualities are apparent ubiquitously and are comparable between Clear Creek a nearby Valley Wall. Comparability between Clear Creek and a nearby Illinois River location also display an ever-present relationship of their discharge. Through USGS, the discharge of streams and springs correlate two water types; karst development.

Spaniards in the sixteenth century came upon it at the wrong time, saw an ocean moving south, and may have been discouraged. Where the delta began, at Old River, the water spread out even more through a palimpsest of bayous and distributary streams in forested palatal basins but this did not dissuade the French. When rivers go over their banks, the spreading water immediately slows up, dropping the heavier sediments. The finer the silt, the farther it is scattered, but so much falls close to the river that natural levees rise through time. In the Mississippi, whatever the arrested logs were called individually, they were all “snags,” and after the Army engineers had made Shreve, a civilian, their Superintendent of Western River Improvements he went around like a dentist yanking snags. People began to wonder if the levees could ever be high enough and strong enough to make the river safe. There was no high command in the fight against the water. Every atom that moves onward in the river, from the moment it leaves its home among the crystal springs or mountain snows, throughout the fifteen hundred leagues of its devious pathway, until it is finally lost in the vast waters of the Gulf, is controlled by laws as fixed and certain as those which direct the majestic march of the heavenly spheres. In 1882 came the most destructive flood of the nineteenth century. After breaking the levees in two hundred and eighty-four crevasses, the water spread out as much as seventy miles. In the fertile lands on the two sides of Old River, plantations were deeply submerged, and livestock survived in flatboats.

Different physical structures may be used in stream restoration in order to provide channel stability and in order to provide habitat and other beneficial functions. Some of the typical structures that are used are revetments made of gabions or riprap and woody debris. Each type of structure has benefits and costs that should be considered before installation and some are more appropriate in certain situations than others.

The 2014 Colorado River pulse flow was part of a bi-national agreement, called Minute 319, between the United States and Mexico. The overall goal of Minute 319 was to manage the Colorado River in light of the drastic decrease in the river’s streamflow and the predicted increase in weather variability due to climate change. The pulse flow established through this agreement was an attempt to restore the riparian ecosystem by adding around 100,000 acre-feet of water into the Colorado River. This was an experimental pulse flow, aiming to determine the ideal frequency and quantity of pulse flows in order to maximize the positive impacts. Our analysis reveals the historical context of the Colorado River streamflow rates upstream from the pulse flow,

The watershed model is used to develop projections of peak stream flows and water surface (flood)

The purpose of this report is to geologically evaluate the potential hazards for flooding in Hazard City. This report will include a detailed historic and extrapolated Stream Gauge Data Worksheet, as well as a graph of the Discharge Frequency Curve expected on Clearwater River. The report will provide Hazard city with my scientific analysis, conclusions, and provide recommendations concerning potential flood damages.

valley walls (Kelley & Spilsbury, 1949). Thus, take into account of both human intervention and natural influences, worsening sediment conditions to some extent surge up the debris flow frequency and amplify the magnitude degree.