湖泊科学
湖泊科學
호박과학
JOURNAL OF LAKE SCIENCES
2015年
5期
811-818
,共8页
河道型水库%长潭水库%EFDC模型%污染削减%藻类生长响应
河道型水庫%長潭水庫%EFDC模型%汙染削減%藻類生長響應
하도형수고%장담수고%EFDC모형%오염삭감%조류생장향응
Channel reservoir%Changtan Reservoir%EFDC model%pollution load reduction%response of algae growth
将环境( EFDC)模型应用于广东梅州的河道型水库———长潭水库，经过模型的验证，建立长潭水库水生态数学模型，模拟出水库在现状污染负荷下的藻类生长情况，以叶绿素a浓度为指标，研究水库在丰水年与枯水年富营养化改善程度对不同流域污染削减方案的响应关系.结果表明：现状污染负荷削减10%，在丰水年库尾、库中和库首点位的叶绿素a平均浓度分别降低13.99%、12.00%和10.35%；枯水年3个代表点位叶绿素a平均浓度分别下降8.42%、5.63%和2.10%.污染削减20%的情况下，丰水年3个代表点位的叶绿素a浓度分别降低26.78%、19.25%和17.04%，枯水年对应的降低幅度分别为11.72%、7.97%和5.12%；库尾地区表现出河道的特征，在污染负荷削减的情况下藻类生长能够受到有效遏制，库首地区则表现出湖泊的特性，枯水年这一特征表现更加突出，污染削减20%的情况下，叶绿素a的平均浓度仅降低5.12%.
將環境( EFDC)模型應用于廣東梅州的河道型水庫———長潭水庫，經過模型的驗證，建立長潭水庫水生態數學模型，模擬齣水庫在現狀汙染負荷下的藻類生長情況，以葉綠素a濃度為指標，研究水庫在豐水年與枯水年富營養化改善程度對不同流域汙染削減方案的響應關繫.結果錶明：現狀汙染負荷削減10%，在豐水年庫尾、庫中和庫首點位的葉綠素a平均濃度分彆降低13.99%、12.00%和10.35%；枯水年3箇代錶點位葉綠素a平均濃度分彆下降8.42%、5.63%和2.10%.汙染削減20%的情況下，豐水年3箇代錶點位的葉綠素a濃度分彆降低26.78%、19.25%和17.04%，枯水年對應的降低幅度分彆為11.72%、7.97%和5.12%；庫尾地區錶現齣河道的特徵，在汙染負荷削減的情況下藻類生長能夠受到有效遏製，庫首地區則錶現齣湖泊的特性，枯水年這一特徵錶現更加突齣，汙染削減20%的情況下，葉綠素a的平均濃度僅降低5.12%.
장배경( EFDC)모형응용우엄동매주적하도형수고———장담수고，경과모형적험증，건립장담수고수생태수학모형，모의출수고재현상오염부하하적조류생장정황，이협록소a농도위지표，연구수고재봉수년여고수년부영양화개선정도대불동류역오염삭감방안적향응관계.결과표명：현상오염부하삭감10%，재봉수년고미、고중화고수점위적협록소a평균농도분별강저13.99%、12.00%화10.35%；고수년3개대표점위협록소a평균농도분별하강8.42%、5.63%화2.10%.오염삭감20%적정황하，봉수년3개대표점위적협록소a농도분별강저26.78%、19.25%화17.04%，고수년대응적강저폭도분별위11.72%、7.97%화5.12%；고미지구표현출하도적특정，재오염부하삭감적정황하조류생장능구수도유효알제，고수지구칙표현출호박적특성，고수년저일특정표현경가돌출，오염삭감20%적정황하，협록소a적평균농도부강저5.12%.
The EFDC model has been used to study response of water quality to varying degrees of pollution reduction in Changtan Reservoir. After verification of the model, a water quality model of Changtan Reservoir was built. Algae growth was simulated un-der the present situation of pollution load. Pollution reduction scenarios based on two hydrologic years were simulated using the wa-ter quality model. The results indicated that overmuch nutrient could lead to eutrophication even in wet years. Under 10% reduc-tion of pollution load, average chlorophyll-a concentrations in three areas ( reservoir tail, middle and head areas) decreased by 13. 99%, 12. 00% and 10. 35% in wet year and by 8. 42%, 5. 63% and 2. 10% in dry year, respectively. Under the condition of pollution reduced by 20%, chlorophyll-a concentrations in three areas decreased by 26. 78%, 19. 25% and 17. 04% in wet year and by 11. 72%, 7. 97% and 5. 12% in dry year, respectively. The water in the reservoir tail area behaved flowing-water similar to rivers, while the water in the reservoir head area also behaved still-water similar to lakes, which has been more dramatic in dry year and the average chlorophyll-a concentration decreased by 5. 12%.
