日韩区一区二区三区四|交换国产精品视频一区|国产口爆吞精在线观视频|午夜无码大尺度福利视频|二区亚洲国产精品一区久久|精品国产一级二级三级在线|欧美日韩精品久久久免费观看|亚洲高清一区二区三区高清不卡

position: EnglishChannel  > Oriental Wisdom> Karez System:Lifeblood of Arid Turpan Basin

Karez System:Lifeblood of Arid Turpan Basin

Source: Science and Technology Daily | 2022-07-07 09:49:15 | Author: BI Weizi


The karez system in Turpan Basin. (PHOTO: VCG)

By?BI?Weizi

The famous karez system, a vertical tunnel irrigation system in desert areas, is known as one of the three great projects of ancient China, along with the Great Wall and the Beijing -Hangzhou Grand Canal. It is commonly found in Turpan Basin, Xinjiang Uygur Autonomous Region.

The word karez means "well" in local Uygur language. Turpan karez system was essential to development of Turpan as a significant oasis transit point on the ancient Silk Road around the barren and harsh Taklamakan Desert.

The large number of karez in the Turpan Basin have long become part of the natural geography. Turpan is one of the most arid regions in China, with as little as 16 mm of annual precipitation and as much as 3,000 mm of evaporation, making it the "dry pole" of China. However, with Turpan karez system, water can be delivered through underground canals without being affected by the seasons or sand, making all-year-round irrigation possible.

A complete Turpan karez system consists of four parts: vertical wells, underground water canals, surface channels and dams. First, a number of wells are drilled vertically to collect rainwater, glacier and snow melted water that seeps into the ground during spring and summer time; then, the water is diverted through underground canals to its destination before being brought to surface channels for production and irrigation, which ensures that it will not evaporate or be polluted by the heat and gusty winds; finally, a dam pools water for human use and controls the amount of water flow.

Karez system has witnessed the prosperity and development of Turpan Basin and is a milestone in the history of oasis agriculture development in?arid zones.

Editor:畢煒梓

抱歉,您使用的瀏覽器版本過(guò)低或開(kāi)啟了瀏覽器兼容模式,這會(huì)影響您正常瀏覽本網(wǎng)頁(yè)

您可以進(jìn)行以下操作:

1.將瀏覽器切換回極速模式

2.點(diǎn)擊下面圖標(biāo)升級(jí)或更換您的瀏覽器

3.暫不升級(jí),繼續(xù)瀏覽

繼續(xù)瀏覽
龙井市| 稻城县| 呼图壁县| 平度市| 老河口市| 若羌县| 顺平县| 望都县| 台安县| 安岳县| 拜城县| 郧西县| 安阳市| 阳信县| 望江县| 龙门县| 疏附县| 三都| 托里县| 开封县| 柘城县| 封开县| 勃利县| 拜城县| 和静县| 清镇市| 华容县| 峡江县| 紫阳县| 五华县| 五家渠市| 彭阳县| 安达市| 广州市| 蓬溪县| 涿州市| 巴东县| 多伦县| 安丘市| 都匀市| 方城县|