CAJ | 학술논문

对两种水体悬浮颗粒物吸收系数测定方法及相关计算进行对比研究。通过长江中下游湖泊典型藻类的实验室培养,利用T方法和T-R方法分别对藻类颗粒物、藻类泥沙混合悬浊液进行吸收系数测定。通过颗粒物光谱吸收系数与叶绿素a之间的相关性关系,对比了两种方法的测量稳定性。通过对不同比例的藻类和无机悬浮颗粒物( ISS)的混合悬浊液进行分析,获得了不同浊度水体悬浮物吸收光谱的变化情况。结果表明,在纯藻或者泥沙含量较少的水体进行颗粒物吸收系数光谱测定时,T方法和 T-R方法均可以采用,并且均具有较高的测定精度。然而,在泥沙含量相对较高的浑浊水体,应尽量选取T-R方法进行颗粒物吸收光谱的测定,以提高测定精度。长江中下游浅水湖泊由于底泥易受风浪影响发生再悬浮,因此在颗粒物吸收系数光谱测定中,当水体中 ISS含量超过30 mg/L时,应选择T-R方法。
대량충수체현부과립물흡수계수측정방법급상관계산진행대비연구。통과장강중하유호박전형조류적실험실배양,이용T방법화T-R방법분별대조류과립물、조류니사혼합현탁액진행흡수계수측정。통과과립물광보흡수계수여협록소a지간적상관성관계,대비료량충방법적측량은정성。통과대불동비례적조류화무궤현부과립물( ISS)적혼합현탁액진행분석,획득료불동탁도수체현부물흡수광보적변화정황。결과표명,재순조혹자니사함량교소적수체진행과립물흡수계수광보측정시,T방법화 T-R방법균가이채용,병차균구유교고적측정정도。연이,재니사함량상대교고적혼탁수체,응진량선취T-R방법진행과립물흡수광보적측정,이제고측정정도。장강중하유천수호박유우저니역수풍랑영향발생재현부,인차재과립물흡수계수광보측정중,당수체중 ISS함량초과30 mg/L시,응선택T-R방법。
Two methods for measuring absorption coefficients of suspended particulate matters in water were studied and compared. Through the laboratory culturing of typical algae from the shallow lakes in the middle and lower reaches of Yangtze River, the algal particles and the suspension of algae and sediments were determined by Transmittance ( T) and Transmittance-Reflectance ( T-R) methods, respectively. The measuring stability of the two methods was compared according to the relationships between the spectral absorption coefficients and Chlorophyll-a of the suspended matters. To obtain absorption spectral changes of suspended matters at different levels of turbidity water, the suspension composed of algae and inorganic particles in different concentration gradients were analyzed. The results showed that both T and T-R methods could be applied and have high measurement precisions in pure algae or water containing less inorganic suspended particulate matters. However, the T-R method should be selected for the suspended par-ticulate matter absorption spectra determination in turbid water. This can improve the measurement precision. Considering that the sediments in the study area are susceptible to wind and thus re-suspension, when the inorganic suspended particulate matters in wa-ter exceeded 30 mg/L, the T-R method should be selected.