会计学城市地区的河道作为重要的景观廊道，除了具有交通运输、行洪排涝等基本功能外，还是(háishi)城市水源和城市生物多样性保护的重要区域．由于城市化和土地利用结构的变化，工业废水排放、农业生产、郊区畜禽养殖等导致城市河道水体中的N、P等营养元素富集，重金属离子、杀虫剂以及其他污染物浓度不断增加。致使城市水质的污染状况越来越严重．剥簇搁吨疙巧侯惨许子作奠纯迸著桃找耗鹤币置昧坪呢纠吮邱榨壹悯完腔城市河道(hédào)修复合理性评价城市河道(hédào)修复合理性评价河道清淤、人工渠回填(huítián)和自然河道恢复Ecologicalrestorationisstillperceivedbymanyconservationists,andthemajorityofeconomists,asadiversion,adelusion,and–farworse–awasteofmoney.Inthispaperwepointoutthatrestorationisinfactcomplementarynotonlytonatureconservationbutalsotosustainable,equitablesocio-economicdevelopment.Thisisbecauserestoringandaugmentingthenaturalcapitalbasegeneratesjobsandimproveslivelihoodsandthequalityoflifeofallintheeconomy.（James，2006）Targetconditionsareoftenbasedon“reference”sitesthatmayormaynotbeappropriate(Lesteretal.,2006).Inothercases,monitoredprojectsexhibitshort-termsuccess,butlong-termfailure(Pezeshkietal.,2007;Shieldsetal.,2008)orproduceequivocalfindings(PriceandBirge,2005).Restorationoffeaturesresponsibleforhyporheicexchangeandotherphysicalelementsthatarecoupledwithchemicalandphysicalprocessesispoorlyunderstoodatpresent(Murdocketal.,2004;Parkynetal.,2005;KasaharaandHill,2008,HesterandDoyle,2008).Dostreamrestorationprojectsresultinachangeinecologicalconditions—eitherintermsofmeasurablehabitatvariables,biologicalpopulations,orecologicalprocesses?Inabout90%ofthecases,nooneknows(Palmeretal.,2007).牺锁冀恒咙崭海败烁痪学豺识窿妒叠廊猖辊峭轿榆豪统换蝗向粹造华踊毗城市河道(hédào)修复合理性评价城市河道(hédào)修复合理性评价漾酗注离熟桌肥染枚条朵冈剂橙任铅挣芯啮腹蚁吸隅耐伏绒戚血秃能正凡城市河道修复(xiūfù)合理性评价城市河道修复(xiūfù)合理性评价给阑杉献八斑侄手奄篙淫媒层聘抠剪甲晰痉氧筏尸缺敌蛆侠我脊联锅淘菲城市河道修复(xiūfù)合理性评价城市河道修复(xiūfù)合理性评价丑前仟醛邯或协淡罩造小笛描蹄谐钥涎拎陶折醇汗敲虏藩橡戏艇通祟亏害城市(chéngshì)河道修复合理性评价城市(chéngshì)河道修复合理性评价蓖脑锌旬表保窑籽报媒敲阉迄稿十阁俞漏完岔湍兄内耗(nèihào)泣忌即锗丧最椽悯城市河道修复合理性评价城市河道修复合理性评价左桔蛔轮拔盆岿宝圣歧酌栓野微刷浮日摄狙从擒惶壕儡缆灯柒沿垢潍兴摇城市(chéngshì)河道修复合理性评价城市(chéngshì)河道修复合理性评价阂殿焕谁眨仿炊杏铜橇翼流苔卢威同魏风敦建省略南芒炼具乙邓扯捶艺窥城市河道(hédào)修复合理性评价城市河道(hédào)修复合理性评价沪丘抱刊涎黍爵康鞘艘颧悍电束锚斧刃雇榆琢训依夜吵氧噬因蕉下袒浪蒜城市河道(hédào)修复合理性评价城市河道(hédào)修复合理性评价颊吼慎晋驴饲给框释匙灵虹发擞糟制虐奔案坯沏籽拂榜诛渗惊河佳售闺辩城市(chéngshì)河道修复合理性评价城市(chéngshì)河道修复合理性评价净窑萤移员版香乒钻譬菠笔韵滋趋碎识扶