CAJ | 학술논문

在2011年7月鄱阳湖丰水期水质参数采样分析的基础上,结合Delft3D水动力模型结果,针对鄱阳湖湖区建立了8个水文地貌分区,分析了丰水期总悬浮泥沙(TSS),总磷(TP)、总氮(TN)与叶绿素a(Chla)浓度的空间分布特征,研究了各分区下的水质因子之间的关系.结果表明,鄱阳湖丰水期平均 TSS 浓度为33.65mg/L,远高于2003年以前10mg/L 的平均浓度水平；平均氮、磷营养盐浓度分别为1.61mg/L 及0.075mg/L,已达到并远远高于富营养化发生条件,而平均Chla浓度为5.99μg/L,并未达到富营养化湖泊水体临界值.Chla与其他各水质因子无显著相关性,而高泥沙浓度区域的 TP 与 TSS 呈现显著相关性.在不同鄱阳湖水文地貌分区下,高强度湖泊采砂活动的北部高流速水域TSS浓度高于河口三角洲水域3倍；TN,TP营养盐浓度表现为流域面源污染负荷大的赣江,饶河河口三角洲水域≥高强度湖泊采砂活动的北部高流速水域>流域污染负荷较小的修水河口三角洲水域及中部湖心水域.Chla则受营养盐浓度水平与水动力因素共同作用而表现为河流交换速度慢且高营养盐浓度水域>水流交换速度快且高营养盐浓度水域>水流交换速度慢且低营养盐浓度水域,其中饶河信江潼津河河口三角洲水域Chla浓度最高,平均水平达到12.53μg/L,超过了富营养化水体的临界值.
재2011년7월파양호봉수기수질삼수채양분석적기출상,결합Delft3D수동력모형결과,침대파양호호구건립료8개수문지모분구,분석료봉수기총현부니사(TSS),총린(TP)、총담(TN)여협록소a(Chla)농도적공간분포특정,연구료각분구하적수질인자지간적관계.결과표명,파양호봉수기평균 TSS 농도위33.65mg/L,원고우2003년이전10mg/L 적평균농도수평；평균담、린영양염농도분별위1.61mg/L 급0.075mg/L,이체도병원원고우부영양화발생조건,이평균Chla농도위5.99μg/L,병미체도부영양화호박수체림계치.Chla여기타각수질인자무현저상관성,이고니사농도구역적 TP 여 TSS 정현현저상관성.재불동파양호수문지모분구하,고강도호박채사활동적북부고류속수역TSS농도고우하구삼각주수역3배；TN,TP영양염농도표현위류역면원오염부하대적공강,요하하구삼각주수역≥고강도호박채사활동적북부고류속수역>류역오염부하교소적수수하구삼각주수역급중부호심수역.Chla칙수영양염농도수평여수동력인소공동작용이표현위하류교환속도만차고영양염농도수역>수류교환속도쾌차고영양염농도수역>수류교환속도만차저영양염농도수역,기중요하신강동진하하구삼각주수역Chla농도최고,평균수평체도12.53μg/L,초과료부영양화수체적림계치.
Based on the in situ measurements from the field survey in July, 2011, the objective of this paper was to investigate the spatial distribution of the total suspended sediment (TSS), total nitrogen (TN), total phosphorus (TP), and chlorophyll a (Chl a), where their impacting factors were also studied by dividing the lake into 8 hydro-geomorphological partitions considering the hydrodynamic conditions. Results show that the TSS concentration was 33.65mg/L, which was three times higher than that of the average conditions before 2003. The N, P concentrations were 1.61mg/L and 0.075mg/L respectively, which appears much higher than the requirements of eutrophication. The average Chl a concentration was 5.99 μg/L, which was smaller than the threshold of being a eutrophic lake. Correlation analysis showed that TP and TSS were significantly correlated with each other in high sediment concentration regions, while no significant correlation was observed between the Chl a and other water quality parameters. In different hydro-geomorphological sections, due to pollution inputs from the watershed and sand mining activities within the lake, the TSS concentration of the northern high velocity water regions was three times higher than the river estuary area. TN and TP concentrations of the Ganjiang and Raohe river estuary area was larger than the northern high velocity water regions, where Xiuhe River estuary area and some central lake area showed minimum TN and TP concentration. The hydrodynamics also played an important role in regulating the spatial distribution of TSS, TN, TP and Chl a in the lakes, Chl a concentration of the river estuary area was larger than the northern high velocity regions, while the Rao-Xin-Tong Jin River estuary area even reached 12.53μg/L, exceeding the low bound value of being a eutrophic lake.