River, lake and land conservancy in portions of the provinces of Anhui and Kiangsu, north of the Yangtsze River; . f the m;iximum discharge of waterwith a minimum cost of artificial works and a minimum cost ofmaintenance. These questions cannot be answered until the coast,both land and water, has been thoroughly surveyed, and all thisnecessary information is available. The more water that can be discharged at these selected pointsthe less there will remain to be taken care of by other and more 25 expensive means, and the less will be the initial cost of the drainageand conservancy work, and th
River, lake and land conservancy in portions of the provinces of Anhui and Kiangsu, north of the Yangtsze River; . f the m;iximum discharge of waterwith a minimum cost of artificial works and a minimum cost ofmaintenance. These questions cannot be answered until the coast,both land and water, has been thoroughly surveyed, and all thisnecessary information is available. The more water that can be discharged at these selected pointsthe less there will remain to be taken care of by other and more 25 expensive means, and the less will be the initial cost of the drainageand conservancy work, and the less will be the cost of maintenance. The Shu River This is a flood river discharging but little water during the dryseason, but much in a very short time during the rainy season. Norecords of the actual discharge will be available until November,1912. After leaving the mountains of Shantung and reaching thealluvial plain, this river has now one well defined channel to the sea,but many indefinite ones. The water is divided and spread out tosuch an extent that it has not sufficient velocity to keep a channel. WORKING A LOCK This vieu< illustrates the method ado[ted to haiit a Junk tlii-ouoh alock. J fire ropes are attached to the [iiuk and are leound onwindlasses by the country people clean. The channels are more or less blocked by the growth ofaquatic plants, which tend to retard the flow of water, spread it overthe countr)^, and year by year increase the marsh sections. Somedefinite channel to the sea should be selected, the shorter the better,other conditions being equal, and this channel cleaned, deepened andmade of sufficiently large uniform cross section. The channel should 26 be excavated below the level of the country, and whether or not itshould be protected by dykes is a question for further study. Allside outlets or inlets should be protected by regulating sluices, soconstructed as to cut off all flow of water either way when necessary,these outlets or inlets bei
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Keywords: ., bookcentury1900, bookdecade1910, booksubjecthydraulicengineering
