近37a新疆福海县ET_0变化趋势及影响分析  

Trend of ET_0 Change and Its Influence in Fuhai County of Xinjiang during Recent 37 Years

作　　者：李泽鸣[1] 魏占民[1] 刘虎[2] 廉喜旺 田德龙[2] 韩雨轩 

机构地区：[1]内蒙古农业大学水利与土木建筑工程学院,内蒙古呼和浩特010018 [2]水利部牧区水利科学研究所,内蒙古呼和浩特010020 [3]辽宁文星招投标代理有限公司,辽宁沈阳110013

出　　处：《干旱区研究》2015年第3期573-578,共6页Arid Zone Research

基　　金：水利部公益性行业科研专项任务"干旱半干旱牧区灌溉饲草料地高效用水技术研究"(201201008)

摘　　要：研究作物腾发量(ET0)在区域水循环及水资源合理利用中有着关键的作用,选取福海县1975—2011年的气温、相对湿度、风速、日照时数、降水量等气象资料及气象站经纬度,海拔等资料,采用Penman-Monteith公式及逐日气象数据计算逐日ET0,对逐日ET0按月进行累加,计算出逐月及逐年ET0,进而对多年ET0的年内及年际变化特征进行分析,并对福海县多年ET0进行时空分析。采用Mann-Kendall(M-K)检验对ET0进行趋势性分析。利用偏相关系数及回归分析的方法,对多年来福海县的各气候因子变化规律进行分析,探究其与ET0变化的相关关系。最后,利用湿润指数确定ET0变化对当地干湿程度的影响。结果表明:37 a来,福海县ET0在1993年达到最低,在此之前虽有波动但整体趋势逐年减少,而1993年之后ET0产生了逐年增加的趋势;福海县ET0具有循环交替趋势,全县年平均ET0由南向北递减,并与当地地势有着一定的联系;对于福海县来说风速及平均相对湿度是影响当地ET0变化的主要因素;福海县属于干旱地区,当地干旱程度主要受降水量影响,ET0对干旱程度只起到微调作用。Understanding of crop evapotranspiration has a key role in regional water cycle and rational utilization of water resources. This paper, using the data of air temperature, relative humidity, wind speed, sunshine time and precipitation of 37 years of 1975 -2011, as well as information of longitude and latitude, altitude of weather sta- tions ,and employing the Penman-Monteith formulas, calculated the dailyET0, monthly ETo and annual ET0. By Mann-Kendall （M-K） test,the trend of ET0 changes was analyzed. Using the partial correlation coefficient and re- gression methods, the change of climate factors for Fuhai county in recent 37 years were analyzed, and the correla- tion with ETo variation was explored. Finally, the wetness index was used to determine the impact of ETo variation on the local dry and wet. Results showed that the ETo of Fuhai county reached the lowest in 1993 with a decreasing trend year by year. After 1993,ET0 had an increasing trend year by year,and the county＇s average ET0 decreased from the south to the north, and related to the local terrain. The average wind speed and relative humidity is the main factors influencing the local ET0 variation. The county belongs to arid region, and the local drought is mainly affected by precipitation.

关 键 词：参考作物腾发量(ET0) PENMAN-MONTEITH公式 M-K检验 气候因子 福海县 新疆 

分 类 号：P426.2[天文地球—大气科学及气象学]