干旱地区农业研究
榦旱地區農業研究
간한지구농업연구
AGRICULTURAL RESEARCH IN THE ARID AREAS
2013年
4期
57-60,65
,共5页
潜水蒸发%经验模型%水面蒸发%土面蒸发
潛水蒸髮%經驗模型%水麵蒸髮%土麵蒸髮
잠수증발%경험모형%수면증발%토면증발
groundwater evaporation%empirical model%evaporation of water surface%evaporation of soil surface
为提高潜水蒸发计算精度,利用潜水蒸发强度、埋深为零时的土面蒸发强度和水面蒸发强度的实测资料对阿维里扬诺夫公式、叶水庭公式和雷志栋公式中 E0值的选取进行了探讨,同时对比分析了 E0分别为水面蒸发强度和埋深为零时土面蒸发强度两种情况下的潜水蒸发强度。结果表明,针对新疆地区粘壤土类型,对于上述三种公式,若用埋深为零的土面蒸发强度代替水面蒸发强度,计算结果会产生误差,精度偏低,应选用 E0为水面蒸发强度进行计算,获得了η与地下水埋深的指数函数关系。该研究为潜水蒸发经验模型中 E0值的选取提供参考,同时为求解雷志栋公式中参数η提供一种新方法。
為提高潛水蒸髮計算精度,利用潛水蒸髮彊度、埋深為零時的土麵蒸髮彊度和水麵蒸髮彊度的實測資料對阿維裏颺諾伕公式、葉水庭公式和雷誌棟公式中 E0值的選取進行瞭探討,同時對比分析瞭 E0分彆為水麵蒸髮彊度和埋深為零時土麵蒸髮彊度兩種情況下的潛水蒸髮彊度。結果錶明,針對新疆地區粘壤土類型,對于上述三種公式,若用埋深為零的土麵蒸髮彊度代替水麵蒸髮彊度,計算結果會產生誤差,精度偏低,應選用 E0為水麵蒸髮彊度進行計算,穫得瞭η與地下水埋深的指數函數關繫。該研究為潛水蒸髮經驗模型中 E0值的選取提供參攷,同時為求解雷誌棟公式中參數η提供一種新方法。
위제고잠수증발계산정도,이용잠수증발강도、매심위령시적토면증발강도화수면증발강도적실측자료대아유리양낙부공식、협수정공식화뢰지동공식중 E0치적선취진행료탐토,동시대비분석료 E0분별위수면증발강도화매심위령시토면증발강도량충정황하적잠수증발강도。결과표명,침대신강지구점양토류형,대우상술삼충공식,약용매심위령적토면증발강도대체수면증발강도,계산결과회산생오차,정도편저,응선용 E0위수면증발강도진행계산,획득료η여지하수매심적지수함수관계。해연구위잠수증발경험모형중 E0치적선취제공삼고,동시위구해뢰지동공식중삼수η제공일충신방법。
The evaporation rate of water surface (expressed with E0 ) is contained in the common empirical models of groundwater evaporation ,which can be replaced by the evaporation rate of soil surface at groundwater depth of zero . Measured data of groundwater evaporation rate ,evaporation rate of soil surface at groundwater depth of zero and evapora-tion rate of water surface were used to made a discussion on the selection of E0 value in Averiyanov equation ,Ye equation and Lei equation ,so as to improve the accuracy of calculation .Meanwhile ,the groundwater evaporation rate was com-pared under the two conditions in which E0 was the evaporation rate of water surface and the evaporation rate of soil sur-face at groundwater depth of zero ,respectively .The results turned to be that ,in the light of clay loam in Xinjiang ,some calculation error would be caused if the evaporation rate of soil surface at groundwater depth of zero were used instead of the evaporation rate of water surface as for the above three equations .So it was suggested that the evaporation rate of wa-ter surface be used as E0 ,and an exponential function relationship between ηand groundwater table was obtained .The study results may provide references for the selection of E0 in the empirical models of phreatic evaporation ,and offer a new method for calculating the parameter ηin Lei equation .