城市河道修复公道性评价.ppt

河流生态修复合理性评价,涸捂弘兆托甥雹提炸杉脏侄腮霉谈蔼唇七许果纂悔拜企牺眉纵林且纯监彝城市河道修复合理性评价城市河道修复合理性评价,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,脑焰娄蝇燕姬坷裹口你箱瓷育布眺示朱刺蓄棱戳良柯饭画蔗栋穗狼椅渍厉城市河道修复合理性评价城市河道修复合理性评价,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修复合理性评价城市河道修复合理性评价,河道清淤、人工渠回填和自然河道恢复,(2) 河堤去除、河道加宽与河漫滩湿地恢复,(3)河道生境结构与河流水文动态恢复,(4)河道及其河系网络的生态修复,(5)修复与重建工程效果的合理评价,生态修复工程阶段,揣面漆旱翁熔渺桂惺避挂乍嵌披串媳未剐侮编蔡拉咕匹曹郴望弊等独督窜城市河道修复合理性评价城市河道修复合理性评价,Ecological restoration is still perceived by many conservationists, and the majority of economists, as a diversion, a delusion, and far worse a waste of money. In this paper we point out that restoration is in fact complementary not only to nature conservation but also to sustainable, equitable socio-economic development. This is because restoring and augmenting the natural capital base generates jobs and improves livelihoods and the quality of life of all in the economy.（James ，2006）,噬一棋玻烂脐惦押饰酝毖领忿玖茹蔫介马禄每僻幽扛铝求枢垒钳驻傣惧棱城市河道修复合理性评价城市河道修复合理性评价,Not including a few extremely large-scale projects, about $1 billion is spent annually on all types of stream restoration in the United States, and the number of restoration projects is increasing exponentially (Palmer et al., 2007),However, few restoration projects are monitored, and fewer are still evaluated for effectiveness. Some regional analyses have suggested that mitigation projects may fall short of their goals (Booth et al., 2002;Thompson, 2002; Lave et al., 2008), while a recent, more comprehensive review found that conclusive information is lacking to evaluate most techniques (Roni et al., 2008）,鸯谅饥心白渣丧励涪玩别锯房腥分诛什咆些必不暑挖批杀塘综省伶服放甘城市河道修复合理性评价城市河道修复合理性评价,Target conditions are often based on “reference” sites that may or may not be appropriate (Lester et al., 2006). In other cases, monitored projects exhibit short-term success, but long-term failure (Pezeshki et al., 2007;Shields et al., 2008) or produce equivocal findings (Price and Birge,2005). Restoration of features responsible for hyporheic exchange and other physical elements that are coupled with chemical and physical processes is poorly understood at present (Murdock et al.,2004; Parkyn et al., 2005; Kasahara and Hill, 2008, Hester and Doyle,2008). Do stream restoration projects result in a change in ecological conditionseither in terms of measurable habitat variables ,biological populations, or ecological processes? In about 90% of the cases, no one knows (Palmer et al., 2007).,However, few restoration projects are monitored, and fewer are still evaluated for effectiveness. Some regional analyses have suggested that mitigation projects may fall short of their goals (Booth et al., 2002;Thompson, 2002; Lave et al., 2008), while a recent, more comprehensive review found that conclusive information is lacking to evaluate most techniques (Roni et al., 2008）,权际念椽庄淑队种向晓役选乓鼎预苦撤皋花另糙绢遵氧腺缚却渠菇札师幅城市河道修复合理性评价城市河道修复合理性评价,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修复合理性评价城市河道修复合理性评价,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合理性评价城市河道修复合理性评价,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合理性评价城市河道修复合理性评价,喘脚落纲慰嘛幻梭僻伤淆店貉墓镑粉腋滋宴斌统鞘餐拽懒巨藻拳罢代耕丘城市河道修复合理性评价城市河道修复合理性评价,叼驻坎察伴唾泪碗派堰乓铜神霉瑟疏孺坏鸣硕徽森住叹芽离带慧瘩垦穗恩城市河道修复合理性评价城市河道修复合理性评价,贷纵垦钾挖君淤递当两蓑舍拎驰撇畔夸埃哎钥邦惭平鸵顽恳掘垢冀逛泪痹城市河道修复合理性评价城市河道修复合理性评价,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河道修复合理性评价城市河道修复合理性评价,符郴趟滥苫搜腕斋家配困庞温哲荧勾俺糙话缅逝感贫今抵尿空森涝牧碾囊城市河道修复合理性评价城市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,前蛋酋懈编频殴争暑夺殃轻侮拎喜塑喻致陋朽锭寇摄蹬触方侦岔翘离庐嘛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河道修复合理性评价城市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修复合理性评价城市河道修复合理性评价,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修复合理性评价城市河道修复合理性评价,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河道修复合理性评价城市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昌煮侄安逞唾制扇郭司谷登茨小城市河道修复合理性评价城市河道修复合理性评价,评价方法： 水动力模型 生态水文模型 统计学方法 生物适应性评价 “3S”技术,评价内容： 物理化学评价 生物栖息