<kbd id="vvrbf"><font id="vvrbf"></font></kbd>

  • 亚洲最大成人免费av,亚洲理论在线A中文字幕,久草热在线视频免费播放,久久天天躁夜夜躁狠狠85,精品国产91久久粉嫩懂色,色婷婷亚洲精品综合影院,国产亚洲精品成人av在线,中文字幕国产精品二区

    都江堰英文導游詞

    時間:2021-02-22 15:22:41 導游詞 我要投稿

    都江堰英文導游詞

      the dujiangyan dam, 45km north of chengdu, is an ancient technological wonder of the country. more than XX yers ago, li bing(250-200bc), as a local governor of the shu state, designed this water control and irrigation dam and organized thousands of local people to complete the project to check the mingjiang river.for many years the river,flooded the chengdu agricultural area and local farmers suffered a lot from the water disaster. due to the success of the project, the dam automatically diverts the mingjiang river and channels it into irrigation canals. for many years the dam has continued to make the most of the water conservancy works.

    都江堰英文導游詞

      expansion has been undertaken since 1949 and at present the system does a good job of irrigating farming land across 33counties of the western part of sichuan province. local people feel proud of the system becaude it has supported a large amount of people in their daily life.

      what makes this system so good?

      the system is a large hydraulic water project which consists of three main parts: the fish mouth water-dividing dam, the flying sand fence, and the bottle-neck channel.

      the fish mouth functions to divide the flow of water into an inner river and an outer river. long ago, when li bing worked as the local governor of the shu state, he found the old river canal was too narrow to hold much water, which often overflowed the banks and caused disastrous flood. based on natural geographic conditions, he organized the people to build a man-made dam. the whole dam looks like a fish, and the front dam has a circular cone shaped like a fish mouth. it is the dam that channels water into an outer canal and an inner canal. the outer water canal functions as the main stream and holds sixty percent of water in the river. the extra water goes through the inner canal for irrigation in chengdu areas.

      the flying sand fence joins the inner and outer canals. the fence functions to controll the flow of water and discharge excess into the inner canal from the main stream. during the dry season the fence doesn't work much, but when floods occur, the river rushes forward along the outer canal. as it approaches the fence, the fence,the river begins to turn round fast and soon many whirlpools are formed. the volatile whirlpools sweep away sand and pebbles and, throw them into the outer canal. for many years huge bamboo baskets were used as the fence. they were filled with stones and pebbles. however,at present, reinforced concrete weir has replaced the ancient fence.

      so now, let's discuss the bottle-neck channel. a trunk canal was cut through the mountain into two parts which link up the inner canal for irrigation. the small part is later called li dui, which means an isolated hill. chengdu looks like a large bottle and the trunk canal between the mountain and the hill takes shape of the bottleneck. the trunk canal technically has two functions: first, it leads the water to irrigate the farming land in western sichujan; secondly, the trunk casnal works together with the flying sand weir to keep the flow below a certain point in the inner canal during flood season. some stone tablets, which stand on the isolated hill, are engraved in buddhist sanskrit. the local people hope that the buddhist tablets can exert the buddhist superpower to harness flood disaster. for over two thousand years, in fact, the fish mouth water-dividing dam, the flying sand weir, and the bottle-neck channel automatically work together to control foods and sweep away sand and stones in the main stram. the local people benefit a lot from this project.

      not far from the dujiang dam, a daoist temple complex was wrwcted was erected to commemorate the benevolent rule of li bing and his son who succeeded him. li bing and his son were granted the posthumous title of wang. the folk story says that july 24of the chinese lunar calendar is li bing' birthday. on the day many local people visit the temple where they prostrate themselges before the image of li bing and his son and burn incense to honor them. the larger-than-life painted statues of father and son overlook the rushing river below. nearby a stone tablet os engraved with a famous six-character quotation from li bing,"when the river flows in zigzags, cut a straight channel. when the riverbeb is wide and shallow, dig it deeper." the temple which is built near the mountaintop, is a popular stopping place for sightseers. there one can enjoy a unique view of the most modern parts of the water conservation project.

    【都江堰英文導游詞】相關(guān)文章:

    都江堰導游詞03-18

    都江堰導游詞范文01-10

    “都江堰建”導游詞03-31

    都江堰景區(qū)導游詞05-30

    都江堰建導游詞05-25

    都江堰的旅游導游詞03-29

    都江堰景區(qū)導游詞06-22

    都江堰景區(qū)的導游詞10-18

    游覽都江堰導游詞07-21

    主站蜘蛛池模板: 日本深夜福利在线观看| 国产伦精品一区二区三区| 亚洲欧洲∨国产一区二区三区| 青草青草久热精品视频在线观看| 极品尤物被啪到呻吟喷水| 国产精品视频一区二区噜| 中文字幕在线观看一区二区| 免费人成视频在线| 亚洲国产精品久久久天堂麻豆宅男| 四虎成人精品在永久在线| 国产高潮又爽又刺激的视频| 青青青视频免费一区二区| 92精品国产自产在线观看481页| 色一伊人区二区亚洲最大| 又黄又爽又色的少妇毛片| 亚洲青青草视频在线播放| av日韩精品在线播放| 亚洲精品一区二区区别| 高清国产亚洲精品自在久久| 日本免费人成视频在线观看 | 同性男男黄gay片免费| A毛片终身免费观看网站| 日本道播放一区二区三区| 亚洲性日韩精品一区二区| mm1313亚洲国产精品| 91密桃精品国产91久久| 粗大挺进朋友人妻淑娟| 国内精品久久人妻无码不卡| 亚洲国产美国产综合一区| 久久精品色妇熟妇丰满人| 亚洲香蕉伊综合在人在线| caoporn免费视频公开| 亚洲VA久久久噜噜噜久久无码| 精品国产精品午夜福利| 噜噜综合亚洲av中文无码| 亚洲一区二区三区小蜜桃| 最新av中文字幕无码专区| 国产成人免费午夜在线观看| 91香蕉国产亚洲一二三区| 免费国产黄线在线观看| 肥臀浪妇太爽了快点再快点|