中山大学学报(自然科学版)
中山大學學報(自然科學版)
중산대학학보(자연과학판)
ACTA SCIENTIARUM NATURALIUM UNIVERSITATIS SUNYATSENI
2014年
1期
83-88
,共6页
北部湾%海洋环境容量%数学模型%排污区
北部灣%海洋環境容量%數學模型%排汙區
북부만%해양배경용량%수학모형%배오구
Beibu Gulf%marine environmental capacity%numerical model%discharge area
基于无结构网格的MIKE 3 D模型,建立了北部湾三维潮流水质数学模型,计算北部湾近岸海域24个主要排污口COD、无机氮和石油类的环境容量,并通过对比区域规划排污量,得出各排污区环境容量的可利用水平。计算结果表明,环北部湾近岸海域主要排污区COD、无机氮和石油类等的总海洋环境容量分别为221267.1、23058和5297.2 t/a,洋浦、茂名博贺等排污区由于海域开阔,水动力扩建条件好,海洋环境容量相对较大。对比各水平年的区域规划排污量,纳污海域以无机氮超载最为严重。其中,规划近期(2015年)25%排污区出现容量超载,规划远期(2020年)33%排污区出现超载。
基于無結構網格的MIKE 3 D模型,建立瞭北部灣三維潮流水質數學模型,計算北部灣近岸海域24箇主要排汙口COD、無機氮和石油類的環境容量,併通過對比區域規劃排汙量,得齣各排汙區環境容量的可利用水平。計算結果錶明,環北部灣近岸海域主要排汙區COD、無機氮和石油類等的總海洋環境容量分彆為221267.1、23058和5297.2 t/a,洋浦、茂名博賀等排汙區由于海域開闊,水動力擴建條件好,海洋環境容量相對較大。對比各水平年的區域規劃排汙量,納汙海域以無機氮超載最為嚴重。其中,規劃近期(2015年)25%排汙區齣現容量超載,規劃遠期(2020年)33%排汙區齣現超載。
기우무결구망격적MIKE 3 D모형,건립료북부만삼유조류수질수학모형,계산북부만근안해역24개주요배오구COD、무궤담화석유류적배경용량,병통과대비구역규화배오량,득출각배오구배경용량적가이용수평。계산결과표명,배북부만근안해역주요배오구COD、무궤담화석유류등적총해양배경용량분별위221267.1、23058화5297.2 t/a,양포、무명박하등배오구유우해역개활,수동력확건조건호,해양배경용량상대교대。대비각수평년적구역규화배오량,납오해역이무궤담초재최위엄중。기중,규화근기(2015년)25%배오구출현용량초재,규화원기(2020년)33%배오구출현초재。
Based on the unstructured grid MIKE 3D model with the finite volume method,the 3D tidal and water quality numerical model was used to simulate the marine environmental capacity of COD,DIN and oil in the main discharge areas in the Beibu Gulf Economic Zone,China.Compared with the poten-tial future discharges of these three types of pollutants according to the planning scenario around the Gulf, the available level of marine capacity was also discussed.The results indicated that environmental capaci-ty of COD,DIN and oil in the Gulf were 221 267.1,23 058 and 5 297.2 t/a,respectively.Due to the good hydrodynamic diffusing condition,the marine environmental capacities of discharge areas in Yangpu and Bohe were relatively large.The environmental capacity of DIN was seriously overloaded,which lea-ded to 25% and 33% of the discharge areas overloaded in 2015 and 2020,respectively.