My hometown composition Harami

You, the blue Shule River, have been so lonely for many years; Every day, only herds of antelopes pass by you gently ...-Wen Jie's Shule River At the western end of the Hexi Corridor, there is an east-west river. Its name is Shule River.

The word "Shule" originated from Shule country in the western regions, which means the water is big and muddy. Shule River is one of the three inland rivers in Hexi Corridor. Shule River was called Jiduanshui in the Western Han Dynasty, Mingshui in the Eastern Han Dynasty and Bulonger River in the Yuan and Ming Dynasties. Since the Qing Dynasty, it has been renamed Shule River. It has a total length of 670 kilometers and a drainage area of 4. 130,000 square kilometers. Shule Nao, which originated between Shule Nanshan and Tuolai Nanshan in the west of Qilian Mountain in Qinghai Province, winds from southeast to northwest, leaves the snow-capped Qilian Mountain, joins the Changma River in Yumen City, passes through Yumen West and Guazhou County, joins the coda of Danghe River in the northwest of Dunhuang City, and flows into Hala Lake outside Yumenguan Gate in Dunhuang in Han Dynasty, becoming an intermittent river and disappearing into the salt marsh at the border between Xinjiang Uygur Autonomous Region and Gansu. As the Shule River basin is high in the east and low in the west, it has become an extremely rare inland river in China. Shule River can be roughly divided into three sections, from Shule Nao between Shule Nanshan in the west of Qilian Mountain in Qinghai Province to Changma Gorge, with a total length of 346 kilometers and a drainage area of 1. 330,000 square kilometers, after gathering from Shule Nao, the snow water in Qilian Mountain flows northwest through the alpine grassland in Subei County, passes through the big snow mountain-Tolai Nanshan Canyon, and cuts the mountain into Shule Canyon with a depth of several hundred meters, and comes to Changma Basin.

The peaks on both sides of Shule Canyon are high and steep, with an average length of 65 kilometers and a width of 7 kilometers. The current in this section is swift, with an average annual flow of 24. 8 m3/s, annual runoff is 7. 865.438 billion cubic meters, of which June-September accounted for 50-70% of the inflow. Shule River is from the Changmaxia Dam in Yumen to the Shuangta Reservoir in Guazhou, with a length of 129km and a drainage area of 1. Twenty thousand square kilometers. In the process of flowing through Yumen Town, Ma Yin Farm, Sandaogou Town, Hedong Township and Bulongji Township in Guazhou County, it is divided into two tributaries, of which the east branch is divided into two tributaries, Nanshi River and Beishi River, and flows eastward into the terminal lake of Huahai Basin. The west branch is the mainstream, also known as the Bronchi River, which absorbs the Shidaogou River and enters the Shuangta Reservoir in Guazhou County. Shuangta Reservoir is located in the lower reaches of saline-alkali land in the northwest of Dunhuang City, with a length of 195 km and a drainage area of 1. 60,000 square kilometers, most rivers flow into agricultural irrigation areas along artificial canals. Due to irrigation, evaporation and infiltration, the amount of water has dropped sharply. Only a small part of the water flows downstream through Xihu Village, the westernmost part of Guazhou County, and most of it is used for irrigation. A small amount of water enters the northwest of Dunhuang, absorbs a very small amount of leakage from Danghe River and disappears into the salt marsh in Hala Lake.

When there was a flood in ancient times, the Shule River water also flowed into Lop Nur. Qilian Mountain in the upper reaches of Shule River is rich in precipitation, with a glacier area of 850 square kilometers and many alpine grasslands, which is a good pasture. In ancient times, rivers crisscrossed here, with lush foliage and abundant aquatic plants. Now, the supply of rainwater has decreased, and the melting water of ice and snow has increased significantly. The middle and lower reaches are low-lying, and the irrigated agriculture in Yumen Town, Guazhou, Dunhuang and Jinchi-Huahai Oasis has developed rapidly. Water conservancy facilities such as Changma Water Diversion Hub, Shuangta Reservoir and Chijinxia Reservoir have been built one after another, and five reservoirs with 6.5438+100,000 cubic meters have been built in the whole basin, which has effectively promoted the economic development of the basin. So Shule River is a river that reflects nature and society, and it is a river that records vicissitudes of life. Before liberation, there was no advanced transportation system, and you had to walk by the river to survive in the deserted desert. Out of Yumen Pass, the Silk Road is undoubtedly westbound along the Shule River ancient road.

In The biography of Master Sanzang described by Tang Xuanzang, Shule River is called Hulu River. When he went to the Western Heaven (ancient India) to learn Buddhist scriptures, he took monk Hu Shipanto as his disciple in Guazhou (the prototype of the Monkey King in Journey to the West), and the Hulu River in Lu Yu was fast-flowing and unfathomable, so he and his disciple Shipanto provided it to local villagers. There are more than a dozen oases along the Shule River. Immigrants, which continued from the Western Han Dynasty, constantly imported fresh blood, so that they always maintained flesh-and-blood ties with the mainland. In the long years of more than 2,000 years, Shule River Basin has thrived, withered, diverted and cut off several times. Every time we change course and cut off the flow, we turn the bustling city into ruins, turn a large oasis into a desert, and suddenly break the chain of civilization, leaving a confusing historical mystery. Due to the diversion of Shule River, there is no water source at the Suoyangcheng site in Guazhou County, resulting in more than 200,000 mu of farmland being deserted,100,000 people moving, sand dunes everywhere, and red willows everywhere. Now a magnificent city is in ruins. Shule River changes with the increase and decrease of water volume according to the rhythm of the four seasons, and flows along the original river course to evaporate, just like a motherless child who has lost restraint and care, and can only flow silently in the vast Gobi Desert, acting recklessly. The abandonment of some old cities, the drying up of lakes and sandstorms are mostly caused by his diversion and diplomatic relations.

After liberation, the party and the state attached great importance to the comprehensive development and utilization of Shule River Basin, and invested a lot of money in comprehensive improvement, which turned the desert and Iraqi wall outside the Great Wall, which used to be "the vernal equinox was not enough for Yumenguan", into fertile oases. Irrigation area from 43 before liberation. 90,000 mu increased to the present 123. 90,000 mu, and the artificial oasis area is 6.5438+0.255 million square meters. 1996, the project of changing the natural operation mode of Shule River was officially approved by the State Council. This project is called Hexi Corridor (Shule River) Agricultural Irrigation Immigrants Comprehensive Development Project (referred to as Shule River Project). The project involves poverty-stricken areas in Gansu Province 1 1 counties and districts. The life of 50,000 immigrants, the development and utilization of 400,000 mu of land in the river basin and the irrigation of 6,543,800 mu of fertile land. From June 5, 2008 to February 2002, Changma Reservoir, the Shule River hub project, was completed and put into operation after five years of construction. A large reservoir with a height of 54.8 meters, a crest length of 366 meters and a total storage capacity of 65.438+0.94 billion cubic meters stands tall in Changma Gorge. The surging Shule River was intercepted and turned into an artificial lake of Fiona Fang 15 square kilometers. The broad and clear lake lies quietly in the mountains of Qilian, like a beautiful and exquisite sleeping beauty, while the snow peak of Qilian reflected in the lake light and water waves is like the same oil painting. Now you can often see herds of wild antelopes drinking water here, and a large number of migratory birds come here to live. The "Tiansheng Bridge" under the dam passes through the canyon like a rainbow. Standing on the bridge and looking down, it is not only chilling, but also makes people feel very dizzy. The Qilian Gorge leaves Pinghu, with Changma as the main valve, and Shule River has changed the season and space since then, truly changing the natural operation mode for thousands of years.

Since then, this quiet inland river has been closely linked with the vast land of the basin and the people who have lived and will come. People's wisdom has changed the river, and the river has also changed people's lives in the basin with its own wisdom. The linkage of Changma, Shuangta and Jinchi Reservoir in the project area has changed the imbalance of water consumption time; Then, the reconstruction of Shule River main canal and flower sea led the big river flowing since ancient times to the oil river basin in the east, which changed the water imbalance in the basin space. In the past five years, with the assistance of large and small water conservancy projects, the water resources in Shule River Basin have achieved unified planning, unified deployment, unified dispatching and unified management. Store in autumn when there is more water, and irrigate in spring and summer when there is less water. Rivers that have flowed naturally for thousands of years will flow on demand from now on. The blue Shule River flows into Zhahua Village, Xiangyang Village, Xixia Village, Bijiatan, Qidaogou, Qiduntan, Shuangta Town, Shahe Township, Lianghu Township and Guang Zhi Township through many immigrant areas 10, and 6.5438+0.5 million mu of desert has been transformed in Cheng Liangtian. At the same time, the comprehensive development of Shule River basin provides a good opportunity for the development of cascade hydropower stations in the main stream of Changma. The 1 1 hydropower station was built along the canal, which improved the comprehensive utilization efficiency of water resources. Shule River Basin has become the main path and accelerating channel for the polar cold current to return to southern Xinjiang because of its trumpet-shaped terrain with high north-south height, low middle height and opening to the west. The climate is dry, cold and windy, with less precipitation, large evaporation, high dryness, strong wind and sandstorm. Before the Shule River basin was developed by human beings, water resources were mainly consumed by natural ecological environment system. With the development of water resources and agricultural production, great changes have taken place in the ecological environment of the basin. This change not only produced huge economic and social benefits in the basin, but also promoted the development of the artificial ecological environment system in the basin, and also had a negative impact on the natural ecosystem. The most prominent water environment problems are that the downstream rivers become seasonal rivers, or cut off, lakes shrink or dry up, groundwater level drops, and vegetation withers.

The evolution of ecological environment in the project area can be summarized as follows: the ecological environment of artificial oasis is good and the area is expanding; The ecological environment of the desert around the oasis has deteriorated seriously, and a large number of vegetation have died, and the surface sandstorm has intensified; The wetland in the lower reaches of Shule River has shrunk, the lake has dried up, the swamp area has decreased sharply, and the biodiversity has been damaged. To realize the sustainable development of Shule River Basin, we must solve the problem of harmonious development between man and nature. First of all, the water resources in the whole basin should be managed in a unified way and allocated rationally. Changma Reservoir can solve the problem of rational distribution of surface water through water storage and total control. Secondly, control the problem of shutting down the indiscriminate exploitation of groundwater. In particular, the local unplanned and disorderly drilling of wells by farmers led to local water level decline and vegetation withering. In addition, it is necessary to establish a water-saving society, adjust planting structure, change irrigation methods, adjust water prices, and bring surface water and groundwater into the unified management of river basin water resources.

This used to be a roaring river with rough waves and rolling waves. This used to be a river with abundant water plants, which was thorough, transparent and clear. The rolling Shule River, where you once flowed through the desert, has changed its appearance because of history and hope, and flows in the artificial river. "The spring breeze in Yumenguan is warm, and the Shule River shines brightly." The Shule River is rolling in, which not only nourishes the oasis on more than 40,000 square kilometers of land in the basin, but also irrigates nearly one million mu of cultivated land, and also provides 3. 300 million kWh of clean energy has greatly eased the tension between industry, agriculture and electricity in this area, and has greatly promoted the social progress, national unity, environmental improvement, fiscal revenue increase and the coordinated development of man, nature and environment in Jiuquan area. You, the blue Shule River, finally look forward to the best years; Look, that's the farmer's footprints. Listen, this is a shepherd's folk song. You, the blue Shule River, are also singing happily today; Hold up your ivory flowers for the pioneers from the East!