Sewage disposal . farm itself, the surface must be made fairly level, inorder that sewage may not collect in pockets; and when land fil-tration is used the surface must be carefully evened. The sewageis distributed by open carriers of stone, brick, concrete or half-pipe, the finer ramifications of the system being usually simple CONSTRUCTION OF IRRIGATION AREAS 209 trenches. The importance of proper distribution is well indircated by the history of the sewage farm at Aldershot. From1880 to 1895 this plant was badly managed and became a nui-sance. In the latter year Colonel Jones took charge, a
Sewage disposal . farm itself, the surface must be made fairly level, inorder that sewage may not collect in pockets; and when land fil-tration is used the surface must be carefully evened. The sewageis distributed by open carriers of stone, brick, concrete or half-pipe, the finer ramifications of the system being usually simple CONSTRUCTION OF IRRIGATION AREAS 209 trenches. The importance of proper distribution is well indircated by the history of the sewage farm at Aldershot. From1880 to 1895 this plant was badly managed and became a nui-sance. In the latter year Colonel Jones took charge, and, largelyby regrading and by care in laying our distributing channels,brought the farm into such excellent condition that the managersof a military hospital close by are quite satisfied to have it almostbeneath their windows. It is common, as pointed out above, to prepare favorable sandyareas on the farm for treating a portion of the sewage at a some- H B SECTION ^n^j^OTTO??^9r^3q^9q?r>WT)ft^im^nnrilr^T^ 1 ;. PLAM Xand Drains ShownMain Carrier do—— Fig. 59. Diagram of a Sewage Farm (copied by permission fromBarwise, 1904). what higher rate. Provision should also be made for stormwater, either by constructing special roughing filters or byallowing an extra area of land. Barwise (1904) gives the diagramreproduced in Fig. 59 as an ideal plan for a sewage farm. Thesewage passes from the detritus tanks at A to one of the sevenintermittent filters or to one of the twenty-eight irrigation filters at C take the first excess of the storm water flowand the osier beds along the bank of the river receive the re-mainder. If for any reason ordinary concentrated sewage can-not be treated on the beds, it is purified by artificial filters of 210 BROAD IRRIGATION OR SEWAGE FARMING crushed stone at B, which should have a capacity equal to onedays average flow. The surfaces of the filtration areas are generally laid out inridges and furrows, to further facilitate the absorp
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisherlondo, bookyear1919
