2017_2018学年八年级地理上册2.3河流(长江)教案(新版)新人教版.doc

上传人:appealoxygen216 文档编号:1124273 上传时间:2019-05-08 格式:DOC 页数:3 大小:1.12MB
下载 相关 举报
2017_2018学年八年级地理上册2.3河流(长江)教案(新版)新人教版.doc_第1页
第1页 / 共3页
2017_2018学年八年级地理上册2.3河流(长江)教案(新版)新人教版.doc_第2页
第2页 / 共3页
2017_2018学年八年级地理上册2.3河流(长江)教案(新版)新人教版.doc_第3页
第3页 / 共3页
亲,该文档总共3页,全部预览完了,如果喜欢就下载吧!
资源描述

1、12.2 气候第二课时长江班级 科目 上课时间 知识与能力1、长江的基本概况2、长江的美称与开发3、长江的生态问题及治理措施过程与方法小组合作学习教学目标情感态度与价值观五号、宋体教学重点难点重点:长江的开发难点:长江各个河段的生态问题及治理措施教学过程导入长江之歌活动一:了解长江概况,完成下列填空1、山脉甲: 海洋乙: 2、河流: 3湖泊: 丙 3、长江的发源地在 (地形区) ,全长 千米。4、长江中上游分界线: ,长江中下游分界线: 5、长江三最: 最长; 最广; 最大。活动二:长江的开发(阅读课本获取信息)1、长江的河流价值:供水、塑造平原(长江中下游平原)、航运、水能、旅游、养殖、灌溉

2、2、长江的美称(小组讨论,提出支持这些美称的依据)“水能宝库”:阶梯交界处(落差、流量)长江三峡水利枢纽三峡:巫峡、西陵峡、瞿塘峡首要目的:防洪,次之:发电“三峡”水利枢纽作用:防洪、发电、航运、旅游、供水、养殖“黄金水道”:是指其通航里程占全国内河航道总里程的 2/3,且宜宾以下可四季通航。 活动三:长江的治理(小组合作,分析讨论各个河段存在的问题及治理措施)主要危害:洪涝发生地段:中下游地区原因:自然:降水集中在夏季且易降暴雨,两岸支流同时注入干流,干流容易决堤。人为:1、上游砍伐树木、陡坡开荒 ,造成水土流失 ,河道泥沙淤积河道 ,易发洪水 2、中游围湖造田,湖泊调蓄能力降低防洪是综合治理长江的首要任务重点治理了滩多流急的川江和“九曲回肠” 的荆江,疏浚长江河道,加强沿江港口建设,提高了长江运输能力。2长江中上游地区:水土流失,措施:植树造林,保持水土; 实行平垸行洪、退田还湖计划,减少抗洪压力。长江中下游地区:洪涝、水污染,措施:建水库、裁弯取直工程、疏通河道;建立污水处理厂、加大水污染、保护水资源的宣传力度

展开阅读全文
相关资源
猜你喜欢
  • AECMA PREN 4082-1994 Aerospace Series Screws Pan Head Slotted Threaded to Head in Heat and Corrosion Resisting Steel Passivated Classification  900 MPa (at Ambient Temperature) 650.pdf AECMA PREN 4082-1994 Aerospace Series Screws Pan Head Slotted Threaded to Head in Heat and Corrosion Resisting Steel Passivated Classification 900 MPa (at Ambient Temperature) 650.pdf
  • AECMA PREN 4083-1995 Aerospace Series Nuts Bihexagonal Self-Locking Reduced Height with Counterbore in Heat Resisting Steel MoS2 Lubricated Classification  1 100 MPa (at Ambient Te.pdf AECMA PREN 4083-1995 Aerospace Series Nuts Bihexagonal Self-Locking Reduced Height with Counterbore in Heat Resisting Steel MoS2 Lubricated Classification 1 100 MPa (at Ambient Te.pdf
  • AECMA PREN 4084-1993 Aerospace Series Nuts Anchor Self-Locking Fixed Two Lug with Counterbore in Alloy Steel Cadmium Plated MoS2 Lubricated Classification 1 100 MPa (at Ambient Tem.pdf AECMA PREN 4084-1993 Aerospace Series Nuts Anchor Self-Locking Fixed Two Lug with Counterbore in Alloy Steel Cadmium Plated MoS2 Lubricated Classification 1 100 MPa (at Ambient Tem.pdf
  • AECMA PREN 4085-2001 Aerospace Series Nickel Base Alloy NI-B40002 Filler Metal for Brazing Amorphous Foil Edition P 2 Supersedes Edition P 1 January 1994《航空航天系列镍基合金铜焊用填缝金属.P2版代替.P1.pdf AECMA PREN 4085-2001 Aerospace Series Nickel Base Alloy NI-B40002 Filler Metal for Brazing Amorphous Foil Edition P 2 Supersedes Edition P 1 January 1994《航空航天系列镍基合金铜焊用填缝金属.P2版代替.P1.pdf
  • AECMA PREN 4086-1997 Aerospace Series Heat Resisting Alloy Ni-PD2101 (NiCo14Nb5Ti2) Non Heat Treated Forging Stock a or D Less Than or Equal to 360 mm Edition P 1《航空航天系列.非热处理耐热合金 N.pdf AECMA PREN 4086-1997 Aerospace Series Heat Resisting Alloy Ni-PD2101 (NiCo14Nb5Ti2) Non Heat Treated Forging Stock a or D Less Than or Equal to 360 mm Edition P 1《航空航天系列.非热处理耐热合金 N.pdf
  • AECMA PREN 4087-1998 Aerospace Series Heat Resisting Alloy NI-PD2101 (NiCo14Nb5Ti2) Solution Treated and Precipitation Treated Forgings De Less Than or Equal to 75 mm Rm Greater Th.pdf AECMA PREN 4087-1998 Aerospace Series Heat Resisting Alloy NI-PD2101 (NiCo14Nb5Ti2) Solution Treated and Precipitation Treated Forgings De Less Than or Equal to 75 mm Rm Greater Th.pdf
  • AECMA PREN 4088-1997 Aerospace Series Steel FE-PL5101 (13MoCrNiV4-4-3-1) Vacuum Induction Melted and Vacuum Arc Remelted Carburized Hardened Sub-Zero Treated and Tempered Bar for Ma.pdf AECMA PREN 4088-1997 Aerospace Series Steel FE-PL5101 (13MoCrNiV4-4-3-1) Vacuum Induction Melted and Vacuum Arc Remelted Carburized Hardened Sub-Zero Treated and Tempered Bar for Ma.pdf
  • AECMA PREN 4089-1997 Aerospace Series Steel FE-PL5101 (13MoCrNiV4-4-3-1) Vacuum Induction Melted and Vacuum Arc Remelted Softened Forging Stock a or D Less Than or Equal to 150 mm .pdf AECMA PREN 4089-1997 Aerospace Series Steel FE-PL5101 (13MoCrNiV4-4-3-1) Vacuum Induction Melted and Vacuum Arc Remelted Softened Forging Stock a or D Less Than or Equal to 150 mm .pdf
  • AECMA PREN 4090-1997 Aerospace Series Steel FE-PL5101 (13MoCrNiV4-4-3-1) Vacuum Induction Melted and Vacuum Arc Remelted Carburized Hardened Sub-Zero Treated and Tempered Forgings a.pdf AECMA PREN 4090-1997 Aerospace Series Steel FE-PL5101 (13MoCrNiV4-4-3-1) Vacuum Induction Melted and Vacuum Arc Remelted Carburized Hardened Sub-Zero Treated and Tempered Forgings a.pdf
  • 相关搜索

    当前位置:首页 > 考试资料 > 中学考试

    copyright@ 2008-2019 麦多课文库(www.mydoc123.com)网站版权所有
    备案/许可证编号:苏ICP备17064731号-1