環(huán)評文獻閱讀(存儲版)
【正文】 ents approach ? CE approach offers a promising opportunity to measure the economic values of various environmental impacts caused by large dam construction, since it is concerned with modeling choices varying over a range of characteristics, rather than with the estimation of WTP for a single option. ? CE approach has its theoretical underpinnings ? CE approach has been widely applied in the marketing, transportation, and psychology literature for some time issues on choice experiments ? . Objects to be valued ? The Tong River is a serpentine, 60 kmlong stream flowing through the rugged limestone terrain in the mountainous Kangwon Province39。工程不存在重大的環(huán)境制約因素。 ? 可以種植有一定觀賞價值的較耐鹽植物和適宜濱海鹽土生長的鄉(xiāng)土品種。且工程實施后，河流的水位基本不變化，同時防潮閘還阻斷潮汐，使海水無法上溯，對防治永定新河兩岸土壤的鹽漬化和改良土壤具有正面的作用。 ? 土壤、氣象 ? 工程所在區(qū)域內(nèi)土壤普遍積鹽．土壤鹽堿化嚴重，以鹽化濕潮土、鹽化潮土為主，呈堿性和強堿性。河道開挖于 1971年．西起北辰區(qū)屈家店，東至塘沽北塘街人渤海，全長 66 km。 ? (4)大型游泳生物種類很少，僅采到 11種，經(jīng)濟種類很少 ? (5)本次調(diào)查的底棲生物 6大類共 24種 (含魚類 4種）。施工可能對陸生生態(tài)系統(tǒng)的植被帶來一定破壞，但不是長期的不利影響，可以通過有效生態(tài)保護措施以及竣工后綠化進行恢復。由于永定新河現(xiàn)已兼負排污功能，水質(zhì)污染嚴重。s Youngwol, Jeongseon,and Pyeongchang counties in Korea ? As previously stated, these kinds of environmental damages should be assessed in moary terms through the evaluation of various options that consist o
教學課件相關(guān)推薦
鄂ICP備17016276號-1