CAJ | 학술논문

针对春季太湖上山村水源地嗅味物质严重超标现象（水体中2－甲基异莰醇含量超标约16倍），开展水源地保护区内外近10 km2范围水体与沉积物的研究分析。结果表明，水源地保护区内外水体常规理化指标达到GB 3838—2002《地表水环境质量标准》中Ⅰ至Ⅱ类水质标准，水体及沉积物中营养盐和藻类并未直接影响水体嗅味，叶绿素含量在2?0～9?0μg·L－1之间，悬浮物含量在20～40 mg·L－1之间，大部分处于低位水平；营养盐含量接近GB 3838—2002中Ⅱ类水标准；沉积物营养盐总氮和总磷含量最高分别达3760和468 mg·kg－1，沉积物中重金属铜和锌含量最高分别达50?1和115 mg·kg－1，整体含量稍高，部分点位底泥中酸性可挥发硫含量也较高，最高达5?07μmol·g－1。水体和底泥中嗅味物质超标20多倍，并呈常态趋势。富营养化引起的藻类爆发不是太湖流域春季嗅味异常的原因，而春季低温降雨引起的湖底异重流导致底泥中富集的嗅味物质向水体迁移，可能是造成水体嗅味物质增加的因素。
침대춘계태호상산촌수원지후미물질엄중초표현상（수체중2－갑기이감순함량초표약16배），개전수원지보호구내외근10 km2범위수체여침적물적연구분석。결과표명，수원지보호구내외수체상규이화지표체도GB 3838—2002《지표수배경질량표준》중Ⅰ지Ⅱ류수질표준，수체급침적물중영양염화조류병미직접영향수체후미，협록소함량재2?0～9?0μg·L－1지간，현부물함량재20～40 mg·L－1지간，대부분처우저위수평；영양염함량접근GB 3838—2002중Ⅱ류수표준；침적물영양염총담화총린함량최고분별체3760화468 mg·kg－1，침적물중중금속동화자함량최고분별체50?1화115 mg·kg－1，정체함량초고，부분점위저니중산성가휘발류함량야교고，최고체5?07μmol·g－1。수체화저니중후미물질초표20다배，병정상태추세。부영양화인기적조류폭발불시태호류역춘계후미이상적원인，이춘계저온강우인기적호저이중류도치저니중부집적후미물질향수체천이，가능시조성수체후미물질증가적인소。
In the light of the situation that odorant in the water source area of Shangshan Village was quite abnormal in Spring getting far beyond the standard for water source ( 2-Methylisoborneol content in the waterbody was about 16 times higher than the criterion set in the standard) , a survey was launched of waterbodies and sediments within the range of 10 km2 around the water sources protection zone. Results show that the conventional physical and chemical properties of the waterbodies in the region met the criteria of Grade Ⅰ and Ⅱ in the Standard for Surface Water Environment ( GB 3838-2002);and in the waterbodies and sediments the nutrient salts and algae did not contribute much directly to the odor from the water;Chlorophyll varied between 2?0-9?0 g·L-1 and suspended solids between 20-40 mg·L-1 in content, and were in low levels in most of the area. The content of nutrient salts was close to the criteria of GradeⅡof GB 3838-2002;In the sediments the content of total nitrogen and total phosphorus might reach as high as 3 760 and 468 mg · kg-1 , re?spectively, and the content of Cu and Zn as high as 50?1 and 115 mg·kg-1 , respectively, and the area as a whole was a bit higher in content of the heavy metals. AVS content was also quite high in sludge, and might reach as high as 5?07μmol·g-1 . The odorant in the water and sediment were more than 20 times higher than the standard, and tended to remain so. It was found that blooming of algae caused by eutrophication of the waterbody was not the reason why abnormal odor oc?curred in the Taihu Lake region in spring; rather the low temperature and rainfalls in spring caused occurrence of density currents in the bottom of the lake, which in turn triggered release of the odorant accumulated in the sludge into the water?body. This is probably one of the explanations of why abnormal odor occurs in the Taihu Lake in spring.