1、B题地区降水量问题降水量是衡量一个地区降水多少的数据 。
空气柱里含有水汽总数量也称为可 降水量 。
它对应于空气中的水分全部凝结成雨、 雪降落所能形成的降水量 。
降水 量是指从天空降落到地面上的液态和固态（经融化后）降水 ， 没有经过蒸发、渗 透和流失而在水平面上积聚的深度 。
它的单位是毫米 。
某地区地形分布数据如附件1给出 ， 该地区30年水量站资料如附件2给出 。
请你建立数学模型解决以下问题1、试作出该地区的空间三维图及等高线图 ， 求解出流入该地区山谷区域的 最大、最小、年均水量？2、估算说明在所给区域内的海拔在 500米以上部分的地表面积 ， 并分析说 明其精度？3、分别考虑该地区植被完好和沙漠化两种情形对降水量 。

2、是否有影响 ， 如何 影响 ， 并给出理由？附件1:地区地形数据（三坐标分别代表其横、纵、竖坐标 ， 单位：米）z1000998.75995.00988.69979.80968.25953.94936.75916.52893.03x050100150200250300350400450y0000000000987.42825.32800.00759.93714.14661.44600.00526.78435.89312.255005506006507007508008509009500000000000z998.55997.95996.95995.54993.73991.51988.89985.85982 。

3、.40978.52x50505050505050505050y20406080100120140160180200994.77994.18993.18991.77989.95987.72985.09982.04978.57974.68970.3610010010010010010010010010010010020406080100120140160180200220965.61960.42988.48987.88986.86985.44983.62981.38978.72975.65972.161001001501501501501501501501501502402602040608010 。

4、0120140160180968.25963.90959.11953.87979.59978.98977.96976.52974.68972.42969.74151501501502002002002002002002C0020022024026020406080100120140966.64963.12959.17954.78949.45944.67968.04967.42966.39964.94963.0720020020020020020025025025025025016018020022024026020406080100960.78958.07954.93951.37947.369 。

5、42.92938.03932.68953.73953.10952.05250250250250250250250250300300300120140160180200220240260204060950.58948.68946.36943.61940.43936.80932.74928.22923.26917.8230030030030030030030030030030035080100120140160180200220240260936.54935.90934.83933.33931.40929.03926.23922.98919.29915.1535035035035035035035 。

6、035035035020406080100120140160180200905.48899.94916.30915.64914.54913.02911.04908.63905.76902.4435035040040040040040040040040024026020406080100120140160894.43889.72884.53878.76893.25892.13891.01889.44887.41884.9340040040040045045045045045045020022024026020406080100120878.58874.70870.34865.51860.1785 。

7、4.34865.79865.10863.94862.3245045045045045045050050050050016018020022024026020406080857.67854.63851.12847.11842.61837.62832.11826.08834.93834.215005005005005005005005005505501201401601802002202402602040831.32829.16826.50823.35819.70815.54810.86805.67799.94793.6655055055055055055055055055055080100120 。

8、140160180200220240260798.99797.75795.99793.73790.95787.65783.84779.45774.60769.16600600600600600600600600600600406080100120140160180200220756.57759.67758.88757.56755.71753.33750.41746.93742.90738.3160065065065065065065065065065026020406080100120140160180727.39721.04714.07713.86713.02711.62709.65707. 。

9、11703.99700.2965065065070070070070070070070022024026020406080100120140691.09685.57679.41672.61665.13661.14660.98658.71656.58653.8370070070070070075075075075075018020022024026020406080100646.45641.79636.47630.48623.78616.36608.19599.67598.67596.99750750750750750750750800800800140160180200220240260204 。

10、060591.61587088583.44578.27572.36565.69558.21549.91540.74800800800800800800800800800100120140160180200220240260附件2:某地区1980至2010年水量站测得的降水量资料年份年降水量（mm）年内一次取大降水重（mm）备注19801434.680.219811214.170.119821516.573.219831346.386.119841321.050.419851235.066.91986858.470.119871130.157.619881233.071.21989978.110 。

【地区|B题地区降水量问题】11、6.819901329.595.419911272.171.519921159.359.519931355.8108.519941440.586.719951563.9183.419961187.575.819971348.053.619981303.2120.119991246.771.520001199.951.220011263.174.020021482.994.52003979.454.120041322.9124.32005880.775.120061102.662.920071204.267.520081281.891.52009852.5107.520101038.054.2。

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标题：地区|B题地区降水量问题