北京地区城市绿化典型树种黄栌蒸腾与蒸发散耗水规律分析  

Research of transpiration and evapotranspiration water consumption in commonly used urban tree specie(Cotinus coggygria) in Beijing

作　　者：李薇 张传杰 LI Wei;ZHANG Chuanjie(Beijing Water Impact Assessment Center,Beijing,100161,China;Shandong Agricultural University,Shandong Province Tai＇an,271018,China)

机构地区：[1]北京市水影响评价中心,北京100161 [2]山东农业大学,山东泰安271018

出　　处：《北京水务》2018年第4期12-15,共4页Beijing Water

基　　金：山东省自然科学基金项目:半干旱半湿润地区城市绿地节水与降温机效应机制研究(ZR2016DB12)

摘　　要：以北京市八家郊野公园内的黄栌纯林为研究对象,采用水量平衡法和TDP法,开展人工养护条件下的植被蒸腾、蒸发散耗水规律研究。研究表明:典型日不同胸径的黄栌液流密度变化趋势一致,峰值一般出现在每天11:00—14:00。不同胸径的黄栌液流密度和太阳辐射的相关性显著,且呈二次曲线关系。黄栌生长季(5—10月)耗水总量为731.0 mm,日均蒸发散强度为3.97 mm。全生育期有2个耗水高峰期,分别为5月和7月份,10月份蒸发散强度最小。黄栌蒸腾耗水量为蒸发散耗水量的18.5%。Greenbelt was an important ecological barrier in urban region. In this study, the pure forest of Cotinus coggygria in Bajia park located in Beijing was used as the research object. The water balance method and TDP method were used to study the regularity of vegetation transpiration and evapotranspiration under artificial conservation. The results showed that： The sap flux density of Cotinus coggygria at different DBH in typical day had the same change trend, and the peak value usually appeared between 11：00 and 14：00 every day. The correlation between the sap flux density of Cotinus coggygria with different DBH and solar radiation was significant, and the conic relationship was found. The total water consumption of Cotinus coggygria in growing season（May to October） was 731 mm, and the daily evaporation intensity was 3.97 mm. There were two peak periods of water consumption in the whole growth period, which were appeared in May and July respectively, while the evaporation intensity was the lowest in October. The transpiration water consumption of Cotinus coggygria account for approximately 18.5 percent of the evaporation water consumption.

关 键 词：城市绿化 蒸腾 蒸发散 液流密度 

分 类 号：TV122[水利工程—水文学及水资源]