水环境背景元素的时间差异变化规律

Rule of Water Environment Background Element Change in Different Time.

研究化学元素在枯、丰、平三个水季悬浮态、可溶态、沉积态的含量变化。以黄梨树水文站作为动态观测点，三年观测得出水化学要素、重金属元素及稀有、稀土元素变化最大的是丰水季；悬浮体相当于枯水季的２５０倍；悬浮态和可溶态元素含量（原水）同样形成丰水季＞平水季＞枯水季的趋势；而可溶态元素含量（过滤水）各个水期无大的变化差异。沉积物在三个水季中元素含量变化差异也较小，但有机质相反，含量出现枯水季＞平水季＞丰水季这样的规律。

In this thesis,we study the chemical element content change in suspension,solution and sediment state when in low,high and normal flow season.Taking huanglishu hydrological station as a dynamic observing point,in three years,our observation shows that the biggest changes of chemical element,heavy metal element,rare metal element and rare earth element are in high flow season:suspension is equal to 250 times of it in low flow season;just the same,total element content of solution and suspension state(i.e.original water)forms the trend of high flow season>normal flow season>low flow season.However,element content of solution state(i.e.filtrate water)haven't great change in each flow period.In the three flow seasons,element content of sediment has only a little change,on the contrary,element content of organic matters have the rule of low flow season>normal flow season>high flow season.