刘森(1982-),女，吉林吉林人,工程师,硕士,主要从事水文水资源研究工作。E-mail:49351463@qq.com
TU992.02
江苏省水利科技项目(2015006)；
以南通市为研究对象,以31年实测降雨资料作为样本,采用年最大值法、年多个样法进行选样,通过皮尔逊-Ⅲ型频率曲线分析和高斯-牛顿法对暴雨强度公式进行求解,以绝对均方差作为暴雨强度公式评价指标。结果表明,年最大值法选样使其得到的暴雨公式较年多个样法得到的暴雨公式精度要高。新编暴雨公式与现有公式的比较表明,新编公式比现行公式雨强总体偏大8.5%左右,体现了南通市城区短历时降雨强度较20世纪80年代增幅明显的现实,说明新公式更能反映南通城区现状降雨情况。
Nantong?City?was?selected?as?the?study?area,?and?the?sampling?was?chosen?by?annual?maximum?method?and?annualmulti-?sampling?method?based?on?the?collection?of?precipitation?data?over?31?years.?The?rainstorm?formulas?were?achieved?by?P-?Hdistribution?frequency?analysis?and?GaussNewton?method,?and?the?absolute?mean?square?error?was?utilized?to?evaluate?it.?The?results?indicate?that?the?annual?maximum?method?is?more?appropriate?than?the?annual?multi-?-sampling?method?for?Nantong.?Besides,this?paper?combined?the?existing?rainstorm?formula?with?the?new?rainstorm?formula?for?calibration,?the?results?reveal?that?the?newformula?rainfall?intensity?is?inereased?ahaut?8.5%?which?is?more?accurately?reflects?the?current?rainfall?situation?in?Nantong.
