土默川地区地表总辐射及地表净辐射变化规律分析  

An Analysis of the Variation of Surface Total Radiation and Surface Net Radiation:the Case for Tumochuan Area

作　　者：董烨博 王声锋[1] DONG Ye-bo;WANG Sheng-feng(North China University of Water Resources and Electric Power,Zhengzhou 450000,China)

机构地区：[1]华北水利水电大学,郑州450046

出　　处：《中国农村水利水电》2020年第7期124-128,135,共6页China Rural Water and Hydropower

基　　金：国家自然科学基金项目(51779093)。

摘　　要：以土默川地区的地表总辐射(Rs)和地表净辐射(Rn)为研究对象,利用1978-2017年逐日日照时数、气温及相对湿度等气象数据,通过6种日照时数模型计算了逐日Rs,同时运用1987-1991年逐日Rs的实测数据对各种模型的计算结果进行校核,从而确定了适合本地区的精度最好的计算模型,并采用FAO1990年推荐的Penman-Monteith公式中的辐射项计算公式估算了逐日Rn,通过线性趋势分析和Mann-Kendall趋势分析方法对40 a来Rn的时间变化特征进行分析,结果表明:①基于日照时数的Bahel模型总体拟合精度最好,在本地区表现出最佳的适用性;②土默川地区Rn在上半年呈上升趋势,在下半年呈下降趋势,四季Rn值表现为夏季>春季>秋季>冬季。③在40 a间,夏季平均Rn有较明显的上升趋势,年、春、秋、冬季平均Rn均呈下降趋势,其中冬季Rn下降最明显,秋季Rn下降最不明显。This paper uses Tumochuan to analyze the surface total radiation(Rs)and surface net radiation(Rn)by using meteorological data such as daily sunshine hours,temperature,and relative humidity from 1978 to 2017 to calculate daily Rs through six sunshine duration models.Then the calculation results of the models are checked with measured data of Rs from 1987 to 1991 to determine the best calculation model suitable for the region,and daily Rn is estimated through radiation calculation formula of Penman-Monteith recommended by FAO in 1990.The time variation features of Rn over 40 years are analyzed through linear trend analysis and Mann-Kendall trend analysis.The analysis results show that:①The overall fitting precision of Bahel model based on sunshine hours is the best,demonstrating the best applicability for the region.②The Rn of Tumochuan plain shows an upward trend in the first half of the year and a downward trend in the second half of the year.And the Rn through four seasons is written as summer>spring>autumn>winter.③Over 40 years,the average Rn of summer has a prominent upward trend while Rn of spring,autumn and winter show a downward trend,among which Rn of winter has the most significant decline and Rn of autumn has the faintest droop.

关 键 词：土默川地区 地表总辐射 地表净辐射 日照时数模型 趋势分析 

分 类 号：TV93[水利工程—水利水电工程]