Page:Willich, A. F. M. - The Domestic Encyclopædia (Vol. 1, 1802).djvu/182

158&#93; t. . N entitled tr. ever ' »n a v.-i=r and economical legislature, or at. on similar principles, and with die fame patriotic c pir;t, as has i beer 1 in the different scheme- of inland navigation. BANKS of Rivers, are those natural boundaries within v am is confined, ac ing to the magnitude an i velocity cf its current. But as the course rf rivers is frequently rapid and irre- gular., taking different direction-, -end often turning at acute angles, r ; Qsive inundations, especially in high, spring tides, necess. owing of their banks. Hence it is of tlie stmost importance to every iriha- y of rivers, to ° of the proper method of forming em- ments, for the prevention of ur limits, attempt a full lematical analysis, yet we lay down a few general hints, and by which the reader be guided in the pra i 1. point to be 1 ary to be given to such banks. This must be i 1 water which, < rience, the river bri ee, at whi is to be constructed, fro earn. On this impoi tanfl pi econ j If, therefore, the to be raised at some irom the natural banks of the river i comparatively B AN "ill be re- quired ; the saving will be in the roportion of the former, and the works will be likewise the durable, nearly in the same ratio ; because, by enlarging the additional bed given to the swollen. . its velocity and power of are, likewise, accordingly diminished. Unless, therefore, the freshes of the str be loaded with line sand, Avliich ( decompose the. turf, the em- bankment should always be under- taken at a considerable distance from the edge of a river. By placing die artificial bank at half the breadth of the stream, from its natural banks, its channel will thus be nearly doubled, and the detached space, in general, afford excellent pasturage. 2. The next circumstance to be attended . the river will igher, when embanked, than it did at the time when it was suf- fered to o and hence the difficulty of a ; to what height ir may rise, from the great- est swell which has been obse in its fom. For this rea- son, the utmost rise in some gorge, e the river could not ex:. ::i r, should be ac -.ark- as can be remembered by inhabitants. Now the ction in this place isored ; and, as the .Lion, the latter. . ' nearly in n as the gorge . ned. Those who d of regulating rht of the embank- swell that in the plain, a low, and con-
 * .h we cannot, consistent-