摘要
1997年4月～1998年4月对位于黄河下游氯化物型盐碱地池塘的水化学进行了周年分析。结果表明:(1)该类水体的水型基本为ClNa;总含盐量较高,平均达2.22±0.54g/L;在阴离子中,Cl->SO2-4>HCO-3+CO2-3,其含量分别为673.11±242.01、671.72±218.23和370.73±111.18mg/L。(2)各池总碱度平均值为5.26～7.17mmol/L,其组成主要是重碳酸盐碱度,pH值为7.90～8.76;总硬度含量较高,各池平均在9.58～32.82mmol/L,Mg2+含量大于Ca2+的含量。(3)各离子的周年变化主要是受补充的外源水影响;另外,投饵施肥能降低SO2-4的含量。(4)氮的含量较适合浮游植物的生长,磷的含量相对较低。
The water chemical features for ponds of chloride type saline and alkaline soil located on the bank of the Yellow River, Daluhu lake of Gaoqing country, were measured systematically from April, 1997 to April, 1998. The results show that: (1) on the whole, the water type of this locality was basically Cl Na Ⅱ and Cl Mg Ⅱ occurred at some times, and the salinity was high, the mean value being 2.22g/L, in the anions, Cl ->SO 2- 4>HCO - 3+CO 2- 3, which were 673.11±242.01, 671.72±218.23 and 370.73±111.18 mg/L, respectively. (2) The alkalinities were mainly composed of HCO - 3, the mean values were 5.26~7.17 mmol/L and the pH values ranged from 7.90 to 8.76. Total hardness varied from 9.58 to 32.82 mmol/L, Mg 2+ >Ca 2+ . (3) The annual change of ions was mainly influenced by the contents of ions from exotic waters. Moreover, feeding and using fertilizer can reduce the content of SO 2- 4. (4) The content of three nitrogen was 0.331 mg/L and that of phosphorus was relatively low. However, the water bodies were rich in silicate.
基金
国家"九五"攻关专题!( 96 -0 0 8-0 4 -0 1 )
国家杰出青年科学基金!( 3972 5 0 2 3)资助
关键词
氯化物型
盐碱地
池塘
水化学
黄河三角洲
chloride type saline and alkaline soil
ponds
water chemistry
Yellow River Delat
