盘锦芦苇湿地蒸发散特征研究

采用盘锦湿地生态系统野外观测站在2005年的小气候梯度系统及涡动相关系统观测的数据,对盘锦芦苇湿地蒸发散变化规律进行了分析。结果表明:芦苇蒸发散日变化过程为单峰曲线变化,即中午高,早晚低;蒸发散随生长阶段变化明显,且主要集中在展叶期~开花期~枯黄期内,非生长季蒸发散量很小;净辐射和气温是全年蒸发散的主导影响因子,相对湿度在芦苇生长季内对蒸发散影响显著,风速在非生长季内对蒸发散的影响显著;降水量不能满足蒸发散的需水要求,河流补给也是蒸发散的重要来源。

Evapotranspiration Features of Phragmites communis in Panjin Wetland

Based on the data of the microclimate gradient observation and eddy covariance observation of 2005 year in Panjin Wetland Ecosystem Research Station,Institute of Atmospheric Environment,China Meteorological Administration,the evapotranspiration variation of Phragmites communis wetland in Liao River delta was analyzed.The result showed that the daily variation process of Phragmites communis was fit to the single peak curve,namely high at noon while low at morning and night.The evapotranspiration variations with the growth periods were apparent and mainly occured in three stages: frondesce stage,bloom stage and scorching stage.Net radiation and air temperature were the dominant factors for the evapotranspiration of a whole year,and relative humidity has remarkable effects on evapotranspiration during growth period while wind speed has asme effects during non-growth period.River water was an important source of evapotranspiration when the amount of the precipitation was not enough to supply the evapotranspiration.