doi:10.12202/j.0476-0301.2020139李鹏,
徐宗学^,,
张瑞,
王京晶,
叶陈雷
北京师范大学水科学研究院，城市水循环与海绵城市技术北京市重点实验室，100875，北京
基金项目:国家重点研发计划课题资助项目（2017YFC1502701）；国家自然科学基金资助项目（51579007）

详细信息

通讯作者:徐宗学（1962—），男，教授，博士生导师. 研究方向：水文学及水资源学. e-mail：zxxu@bnu.edu.cn

中图分类号:TV125；P339

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收稿日期:2020-04-14
网络出版日期:2021-01-09
刊出日期:2020-12-01

Extreme?precipitation and?rainfall island?effect?in?Jinan?City

Peng LI,
Zongxue XU^,,
Rui ZHANG,
Jingjing WANG,
Chenlei YE
College of Water Sciences, Beijing Normal University, Beijing Key Laboratory of Urban Hydrological Cycle and Sponge City Technology, 100875, Beijing, China



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摘要
摘要:利用济南市1985、2000和2015年3期Landsat遥感影像资料，监督分类获得每期土地利用类型，分析3个时期全市及中心城区建设用地面积变化情况．基于济南市24个降水站点1972—2016年的逐日降水数据，选取PRCPTOT、R30 mm、R50 mm、SDII、Rx5day和R95p 6个极端降水指标，运用Mann-Kendall趋势检验和Sen′s坡度估计，分析济南市汛期和年际尺度极端降水时空演变特征． 结果表明：1985—2015年济南市建设用地增长迅速，全市范围扩增超5.5倍，中心城区范围扩增近2.0倍； 随着城市化进程发展，济南市中心城区及商河站降水量逐时段增加，但中心城区降水量增速随着城市化发展放缓；年际尺度与汛期尺度的极端降水指标演变特征存在一致性，分别有4、5个站点降水序列具有显著变化趋势；中心城区与商河站极端降水指标均呈上升趋势，与城市化密切相关，其中，汛期中心城区的Rx5day和R95p均以1 mm·a^?1的速率不显著上升．以上事实表明，济南市可能存在一定的雨岛效应．
关键词:极端降水/
雨岛效应/
城市化/
济南市
Abstract:Landsat remote sensing images of Jinan obtained in 1985, 2000 and 2015 were used to identify and classify changes in land use types in the built-up and downtown areas in Jinan．Daily precipitation data from 1972 to 2016 at 24 gauging stations in Jinan were used．Indicators of extreme precipitation (PRCPTOT, R30 mm, R50 mm, SDII, Rx5day and R95p) were selected. Spatiotemporal evolution for extreme precipitation on interannual scales was subject to Mann-Kendall trend test and Sen′s slope estimation．Built-up area in Jinan was found to have increased rapidly from 1985 to 2015; the entire city expanded more than 5.5 times, with downtown area almost doubled．Precipitation in downtown area and Shanghe Station was found to have increased, but increase in precipitation in central city slowed with urbanization．Indicators of extreme precipitation at inter-annual scales and for flood seasons were found have evolved similarly．Significant changes in precipitation sequences at some stations were found．Indicators of extreme precipitation in downtown area and Shanghe Station showed similar upward trend, closely relating to urbanization．Indicators Rx5day and R95p in downtown area increased at a rate of 1 mm·a^?1 in flood seasons．
Key words:extreme precipitation/
rainfall island effect/
urbanization/
Jinan