气候变化背景下阿克苏河流域平原水库蒸发规律研究

为了定量分析阿克苏河流域平原水库蒸发量的变化规律,利用1981-2010年阿克苏河流域水平衡站20cm蒸发皿和20 m2蒸发池的蒸发数据和气象数据,分析阿克苏河流域3座平原水库蒸发量的年内变化规律和年际变化规律,重点分析水库水面蒸发量与水库水面面积的关系、蒸发量与流域气温之间的关系,并定量分析了气温变化对平原水库蒸发量的影响。结果表明:阿克苏河流域3座平原水库蒸发量的年内变化较大,蒸发量主要集中在4-10月,分别占全年总蒸发量的88.14%、87.02%和87.63%。流域平原水库的年际蒸发量变化较小,在气温上升的背景下,1981-2010年流域3座平原水库的年际蒸发量平均每年以1.5%、0.56%和0.18%的速率增加。

Study on evaporation rules of plain reservoir in Aksu river basin under background of climate change

Inorder to quantively analyze the evaporation rules of plain reservoir in the Aksu river basin, the paper used the observational data in the Aksu water blance experiment station from 1981 to 2010 to analyze the evaporation change of the three plain reservoirs within the year and inter year,and emphatically analyzed the relationships between water surface evaporation and water surface area of reservoir, evaporation volume and temperature, and quantitatively analyzed the effect of surface evaporation on reservoir evaporation. The results indicate that the inter annual variation of evaporation is larger, evaporation mainly concentrates in April to October.The amount of evaporation in three reservoirs ccountes for 88.14%, 87.02% and 87.6% of that of total year respectively. The interannual variation of evaporation is smaller.The evaporations of the three plain reservoirs had increased by 1.5, 0.56 and 0.18 percent from 1981 to 2010 an average annual.