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This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1876 edition. Excerpt: ...on the Mississippi with that on the European rivers: the introduction of this sixth root also leads Mr. Hagen to the conclusion that the coefficient of Eytelwein, 50. 9 for metrical measures, gives velocities that are nearly three times too high. A conclusion that can only be correct in some cases. In making the trials necessary for determining the exponents most appropriate for the inclination, there is no objection to leaving the term V R m the formula unchanged as the resulting errors introduced are approximately the same, when the exponents of J are taken at either y and, or i and. The American results (see Hagens article) require an exponent of or J, those of the Netherlands require J, those of the Seine at Paris J or Ji, and those of the Rigoles, Ji. Hence the question arises whether it would not be more advisable to give the term E any other exponent instead of i, which could be suitably applied to both R and J in the velocity formula. In the article referred to the maximum and minimum values of R occurring in large rivers and small canals have very properly been taken into consideration, while however it is remarkable that the extreme values of J have been neglected, although the essential distinction between the American and the European formulae lies in the difference of the exponent assigned to the inclination. All the rivers as well as all the small canals compared in his article have low inclinations, in no case exceeding O'OOl: if rivers of high as well as those of low inclination had been included, as is absolutely essential in attempting to deduce a general formula, there is no doubt that some other exponent for J would have been adopted instead of . As also in addition to this the influence of the degree of...
This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Climate and anthropogenic changes impact the conditions of erosion and sediment transport in rivers. Rainfall variability and, in many places, the increase of rainfall intensity have a direct impact on rainfall erosivity. Increasing changes in demography have led to the acceleration of land cover changes in natural areas, as well as in cultivated areas, and, sometimes, in degraded areas and desertified landscapes. These anthropogenized landscapes are more sensitive to erosion. On the other hand, the increase in the number of dams in watersheds traps a great portion of sediment fluxes, which do not reach the sea in the same amount, nor at the same quality, with consequences on coastal geomorphodynamics. This book is dedicated to studies on sediment fluxes from continental areas to coastal areas, as well as observation, modeling, and impact analysis at different scales from watershed slopes to the outputs of large river basins. This book is concentrated on a number of keywords: “erosion” and “sediment transport”, “model” and “practice”, and “change”. The keywords are briefly discussed with respect to the relevant literature. The contributions in this book address observations and models based on laboratory and field data, allowing researchers to make use of such resources in practice under changing conditions.