辽河流域所在的东北地区是我国主要的升温区域,流域内水资源略显紧张、供需矛盾日渐突出,近年来气候的深刻变化对辽河流域的水资源的影响尤为突出。为充分揭示近30年来辽河流域气候干湿变化趋势,给地区水资源管理提供参考,本文在收集整...辽河流域所在的东北地区是我国主要的升温区域,流域内水资源略显紧张、供需矛盾日渐突出,近年来气候的深刻变化对辽河流域的水资源的影响尤为突出。为充分揭示近30年来辽河流域气候干湿变化趋势,给地区水资源管理提供参考,本文在收集整理气象栅格数据基础上,分别采用小波分析法和Penman-Monteith干湿区划法,对辽河流域1982~2015年蒸散发和降雨数据进行周期特征检验、并进行干湿变化趋势研究。结果表明:1982~2015年间,辽河流域蒸发量主要有4~8 a、16~32 a的变化周期、降水量主要有0.5~1 a、2~4 a的变化周期;1982~2015年间,辽河流域的过湿润区面积先减少再增多,辽河流域东南部有持续湿润的趋势。Liaohe River basin located in northeast China is a principal warming zone, which experiences a relative scarcity of water resources and a growing discrepancy between supply and demand, with climate change having a particularly salient impact on its water resources. To fully reveal the trend of climate change in the Liaohe River Basin over the past 30 years and provide reference for regional water resources management, based on the collection and organization of high-precision meteorological raster data, this study employed wavelet analysis and the Penman-Monteith method for dry-wet zoning to examine the periodic patterns in evapotranspiration and rainfall from 1982 to 2015, and to analyze trends in wetting and drying variations. The findings indicated that between 1982 and 2015, evaporation predominantly followed cycles of 4~8 years and 16~32 years, while precipitation displayed cycles of 6 months~1 year, 2~4 years. Between 1982 and 2015, the excessively wet region experienced an initial decrease followed by an increase in area, with a persistent trend of increased wetness in the southeastern part of the basin.展开更多
文摘辽河流域所在的东北地区是我国主要的升温区域,流域内水资源略显紧张、供需矛盾日渐突出,近年来气候的深刻变化对辽河流域的水资源的影响尤为突出。为充分揭示近30年来辽河流域气候干湿变化趋势,给地区水资源管理提供参考,本文在收集整理气象栅格数据基础上,分别采用小波分析法和Penman-Monteith干湿区划法,对辽河流域1982~2015年蒸散发和降雨数据进行周期特征检验、并进行干湿变化趋势研究。结果表明:1982~2015年间,辽河流域蒸发量主要有4~8 a、16~32 a的变化周期、降水量主要有0.5~1 a、2~4 a的变化周期;1982~2015年间,辽河流域的过湿润区面积先减少再增多,辽河流域东南部有持续湿润的趋势。Liaohe River basin located in northeast China is a principal warming zone, which experiences a relative scarcity of water resources and a growing discrepancy between supply and demand, with climate change having a particularly salient impact on its water resources. To fully reveal the trend of climate change in the Liaohe River Basin over the past 30 years and provide reference for regional water resources management, based on the collection and organization of high-precision meteorological raster data, this study employed wavelet analysis and the Penman-Monteith method for dry-wet zoning to examine the periodic patterns in evapotranspiration and rainfall from 1982 to 2015, and to analyze trends in wetting and drying variations. The findings indicated that between 1982 and 2015, evaporation predominantly followed cycles of 4~8 years and 16~32 years, while precipitation displayed cycles of 6 months~1 year, 2~4 years. Between 1982 and 2015, the excessively wet region experienced an initial decrease followed by an increase in area, with a persistent trend of increased wetness in the southeastern part of the basin.
