利用承压井水位估算土壤植被蒸散发量  

Evaluation of Actual Evapotranspiration Using Water Levels of Confined Aquifer

作　　者：付丛生[1] 陈建耀[1] 曾松青[2] 赵新锋 

机构地区：[1]中山大学地理科学与规划学院水资源与环境研究中心,广州510275 [2]广东省水文局汕头水文分局,广东汕头515000 [3]珠海市环境保护监测站,广东珠海519000

出　　处：《自然资源学报》2010年第5期850-858,共9页Journal of Natural Resources

基　　金：国家自然科学基金(40571027);广东省自然科学基金(9251027501000021);广东水利科技创新与推广项目(2008年度);中山大学后备重点基金项目

摘　　要：论文回顾了有关"大气压强、井水位、气压系数、负荷系数、地表和地下储水量"的理论、井水位的气压响应模式、气压系数、负荷系数的计算方法;在利用Mallat分解重构算法去除了井水位趋势项的基础上,计算了3口观测井不同时期的气压系数以及气压系数随时间延迟的变化,计算结果表明:观测井M5、R3、R6在2006-11-05至2007-03-19具有明显的承压性;2008-03-01至04-19,M5井仍具有明显的承压性,R3井、R6井则具有明显的非承压性。此外,论文还利用观测井M5、R3井的水位变化、含水层的负荷系数、实测气压系列,计算了观测井所反映区域、含水层以上地表和地下储水量的变化,并结合实测的降雨资料、水面蒸发资料,估算了区域土壤植被的蒸散发量,经估算:R3井附近区域枯季的每日蒸散发量约为1.9～2.1 mm,蒸散发系数约为0.70～0.78。The relationships of atmospheric pressure, groundwater level, barometric efficiency, loading efficiency, and water storage were reviewed regarding the response of water level to the hydrological components and the calculation methods, specifically for loading and barometric efficiencies. Data series of barometric value and water level measured in the Zhuhai campus of Sun Yat-sen University were collected to evaluate the change in water storage and thus the water loss due to evaporation. By removing the trend component of water level series with Mallat decomposition and reconstruction method, the barometric efficiency were calculated. The characteristics of confined aquifer were found for three wells during the period 2006 - 11 -05 to 2007 -03 - 19, while they were also found for M5 during the period 2008 -03 -01 to 04 - 19 but not found for R3 and R6. The change of water storage was calculated using water-level of well M5 and R3, the loading efficiency of confined bedrock fissure aquifer and the observed barometric while water loss, principally in the form of evapotranspiration was evaluated based on et. Evapotranspiration of the study area estimated is about 1.9 - 2. lmm/d and it 70% - 78% of pan evapotranspiration.

关 键 词：承压基岩裂隙水 大气压强 气压系数 负荷系数 Mallat分解重构算法 珠海 

分 类 号：P333.1[天文地球—水文科学]