论文部分内容阅读
依据玛纳斯河中游莫索湾灌区1998—2007年(共120个月)的地下水位监测资料,分析地下水埋深年际变化情况,采用主成分分析法对灌区地下水埋深变化的影响因素进行分析.结果表明:地下水埋深年际变化持续或波动下降;灌水量和抽水量是影响地下水埋深的主要因子,其荷载分别为0.801和0.769,埋深随灌水量的减少、抽水量的增加而增大;蒸发量仅次于灌水量和抽水量,也是影响地下水埋深的重要因子;而降雨量对地下水埋深没有显著的影响,其贡献率只有15%.分析了主要影响因素与地下水埋深变化动态的关系,认为灌区地下水埋深在自然因素和人为活动的交互影响下年内季节变化明显.
Based on monitoring data of groundwater level from 1998 to 2007 in Mosouwan Irrigation District in the middle reaches of Manas River for a total of 120 months, the interannual variation of groundwater depth was analyzed and the influence factors of groundwater depth in irrigation area were analyzed by principal component analysis The results show that the interannual variation of groundwater depth decreases continuously or fluctuates. The main factors affecting the groundwater depth are the irrigation amount and water withdrawal amount, which are 0.801 and 0.769, respectively. With the decrease of irrigation amount and the increase of pumping amount But the evaporation is second only to the amount of irrigation and pumping, which is also an important factor affecting the groundwater depth.The rainfall has no significant impact on groundwater depth, and its contribution rate is only 15% .The main influencing factors and groundwater Depth of the dynamic changes in the relationship that the irrigated groundwater depth in the interaction of natural factors and human activities under the influence of significant seasonal changes during the year.