Biological oceanography; ocean productivity; nutrient pollution; red tides 生物海洋學(xué);海洋生產(chǎn)力;海洋污染;紅潮
The watershed's worst problem is nutrient pollution, which is caused by the overabundance of the nutrients, nitrogen and phosphorus 分水嶺面臨更嚴(yán)重的問(wèn)題,來(lái)自營(yíng)養(yǎng)物的污染,這些營(yíng)養(yǎng)物污染源自營(yíng)養(yǎng)物質(zhì)、氮和磷的過(guò)量排放。
Abu noman m . ahsanuzzaman1; musharraf zaman2; and randall kolar3 simple expert system for evaluation of nutrient pollution potential in groundwater from manure application international journal of geomechanics ? asce / december 2004 汪木蘭人工智能技術(shù)在數(shù)控系統(tǒng)中的應(yīng)用研究組合機(jī)床與自動(dòng)化加工技術(shù),2002(1)
The value of surplus environmental capacity of din exceeded about 70 percent of the 1st grade environmental capacity in 1997 . since 1997, the impact of nutrients pollution has begun to mitigate because of the enhancing protection of marine ecology by local government . the variation of surplus environmental capacities of din and po4-p in jiaozhou bay implicated that the discharge amounts of din and po4-p to jiaozhou bay were bearable from late 1970s to mid 1980s 但自80年代中期至90年代中后期,營(yíng)養(yǎng)鹽剩余環(huán)境容量迅速減小,至1997年din剩余環(huán)境容量已超過(guò)國(guó)家一級(jí)海水水質(zhì)標(biāo)準(zhǔn)下膠州灣din環(huán)境容量約70,而自90年代末開始膠州灣din剩余環(huán)境容量又有所增加,而po_4-p剩余環(huán)境容量減小速度趨緩。