River, lake and land conservancy in portions of the provinces of Anhui and Kiangsu, north of the Yangtsze River; . ure. Aneroid Barometeis.—To give the atmospheric pressure. Water Gauges.—To give the varying elevations of the water levelin the rivers. All these instruments could be self-recording or not, dependingon the amount of money available. The self-recording instruments are in every way preferable, asthey write out the record for each minute during the twenty-fourhours, and require the attention of the operator only once a day toput in new charts and wind up the weights, whilst the non-
River, lake and land conservancy in portions of the provinces of Anhui and Kiangsu, north of the Yangtsze River; . ure. Aneroid Barometeis.—To give the atmospheric pressure. Water Gauges.—To give the varying elevations of the water levelin the rivers. All these instruments could be self-recording or not, dependingon the amount of money available. The self-recording instruments are in every way preferable, asthey write out the record for each minute during the twenty-fourhours, and require the attention of the operator only once a day toput in new charts and wind up the weights, whilst the non-recordinginstruments require a reading to be taken at certain fixed times, andthese readings recorded. 41 Location of Stations The weather stations sliould be located at points having telegraphstations, and the records should be telegraplied to the Central Officeeach day, and many times a day when there are great atmosphericdisturbances. Neckssity and Advantagks of the Weather Bureau At ]iresent there are no records of tlie rainfall in the entireregion under consideration. No one knows how much rain falls. H.\ICHOW CITY .4 street ill tlie loiire ot Haichoa city, the proposediiectport during the year or at an\ one time, and no one knows the actualeffect the rain in any one area has upon the rivers into which it only thing known is that an excessive rain fall results in floods,but this is not known until the floods arrive. With the Weather 42 Bureau stations in operation a rainfall of any importance may be foretold at least twenty-four hours in advance. When the rainfall arrives the actual amount of it can be measured and the duration recorded. With this data, given a rainfall in any part of the catchment area, say the mountains of Honan, not only will the actual amount of water which has fallen be known, but also the effect of this rainfall upon the streams and rivers through which it flows away will be known hours and days before the arrival of the water, dependin
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Keywords: ., bookcentury1900, bookdecade1910, booksubjecthydraulicengineering
