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开封··位于豫东平原的黄河南岸,地处北纬34°42′13″～34°56′09″,东经114°11′36′～114°30′01″;东西长27.8公里,南北宽25.8公里,总面积393平方公里。 全区地势平坦,海拔高度69～78米,自然坡降在1/4000～1/2000之间。微地貌分为:①黄河改道而形成的高河漫滩地,②黄河大堤以南的背河洼地,③沙丘间的沙碱洼地,④微斜平地等四种类形。土壤有黄潮土与风沙土两种。地下水埋深,浅的仅有一米左右(旱季,下同),
Kaifeng is located on the southern bank of the Yellow River in the plain of East Henan, and is located at latitude 34 ° 42’13 “~ 34 ° 56’09” north and longitude 114 ° 11’36 ’~ 114 ° 30’01 "east longitude and 27.8 km long from east to west 25.8 kilometers, the total area of 393 square kilometers.The flat terrain, elevation of 69 to 78 meters, natural slope in the 1/4000 ~ 1 / 2000. Micro-topography is divided into: ① the Yellow River diversion and the formation of the floodplain, (2) There are four types of sand-bottom depressions in the south of the Yellow River embankment, sand-base depressions in the sand dunes, and slightly inclined flatlands, with yellow soil and aeolian sandy soil. The depth of groundwater is only about one meter shallow with),