| With the development of the society and economy, the water resource shortage has become a global problem, it limits many aspects of man's production and life. The water resource in the West Lamulun river drainage basin is greatly scarce, the drainage basin cross the region of Inner Mongolia autonomous region, Hebei province, Jilin province, and Liaoning Province. It is charged with the work of providing water resource for the 4 regions. Because of the pre-survey of river system change, Restoration of Construction of water resource in North China which my tutor has been done, I has investigated the mechanism of water resource change in the Middle and upper reaches of the west Lamulun river Basin. The area of the middle and upper reaches of the west Lamulun river basin is 100 thousand square kilometers now, but the area of its upper original region is only about 10 thousand square kilometers. In the middle and down basin, there are many quantities of Peistocene fulvio-lacustrine sediments in Kailu basin, for example, the late Pleistocene fluvial-lacustrine sediments is about 64 thousand square kilometers, its thickness is about 80150m, it is impossible to do so for the recent west Lamulun river basin. From the RS images, There is a basin surrounded by a orogenic zone of Daxinganling-yin mountain like a arc on the south-east of Inner Mongolia plateau (e.t. the original watershed of the west Lamulun river). There is not clearly boundary both the watershed and the basin on the south-east plateau. By 3D images, it shows that there is a relationship both the plateau and the river. Through the hydro-geology data, the Luan river, Yongding river and the west Lamulun river all go across the Daxinganling, Yinshan and Yanshan mountain range into the fossil Major fluvial-lacustrine sedimentary basin on the south-east of the plateau, which the basin should be factually the original region of the west Lamulun river, it should have another reason to explain the recent watershed. RS has advantage of large region, informational richness and updating data in time; GIS is greatly ability of informational disposal and analysis and GPS can be used to locate in time. By integrating the three technologies (calling "3S"technology), the information of the atmosphere-land-biology system is picked up, the data and the field survey is regarded as the verification, we have totally study the water resource change on the middle and upper reaches of the west Lamulun river basin, then, the fossil Major fluvial-lacustrine basin is founded, and it is factually the original region of the west Lamulun river. Secondly, the formation and upheaval of the orogenic zone result in the plateau formation, control the down-cut operation of the west Lamulun river and make the river be a main dischargeing channel of water resource of the plateau. The study region is sited on the south east of Inner Mongolia autonomous region, latitude scope: 42.5 47 , longitude scope: E112 121 , the study region area is about 210 thousand square kilometers. on land form, it is across the plateau, Daxinganling mountain range and liaohe plain. The region is typically a jointing belt of agriculture and herding, its eco-environment is much fragile and sensitive, the water resource is cutely scarce, the climate is a semi-arid continental monsoon climate, the rainfall is 200 400mm, which drops from south east to north west, the region is belonged to the jointing belt of the North China Platform and Siberia Platform on land structures, the rift tectonics and basins that fault strike is east-west or north-east are popular, they control the regional land form , the formation and evolution of river system.. The article particularly study the basic characteristics of the fossil major fluvial-lacustrine basin founded recently, therefore, get back the original face. On land form the basin is divided into 5 units Otidag Sandy land on south, the Dalai lake and Xilinhaote Hill on the middle plateau region, Wuzhu basin on the north east and Sunite basin on the north west. By the RS, field investigation and data analysis, before the priod of mid-late Pleistocene, a fossil major fluvial-lacustrine sedimentary basin with lots of rivers and lakes is founded on the south east of plateau, ancient lakes –Otidag ancient lake and the Dalai lake existed in the basin, the west Lamulun river in the middle of two lakes communicated them. The West Lamulun river extends on the west to the south place of the Sunite Basin. In the fossil Majou Basin, many lakes big or little distributed everywhere, many rivers were twisted like a network, vegetation were flourish, these predict that the regional rainfall is affluent, evaporation is little, the atmosphere is wet, water resource is rich, the fluvial-lacustrine sedimentary basin was well a environmental cycling system. By estimation of Pleistocene fluvial-lacustrine sandy soil, the quantity of groundwater resource is 1.848 1012m3 in the Fossil Major Basin, meanwhile, thelate Pleistocene fluvial-lacutrine sediments formed a large groundwater reservoir, the water level of Dalai Lake on early Holocene is 35m higher than now(Gengkai said in 1988), from this data , the quantity of the land surface water resource is approximately 4.194 1012m3, the total quantity is 6.762 1012m3. compared to all the quantity of water resource of Inner Mongolia Autonomous Region now, it is 132.79 times. Rich ground water, affluent land surface water and moderate rainfall constituted a good three water dynamic cycling system, it was a rich water resource region to provide water resource to the North China region and East-north region. The late Pleistocene fluvial-lacustrine sediments both of the watershed of the upper reaches –source head and of the fossil major basin are contacted each other. Only during the recent 10 thousand years, the water resource reduced, water level dropped, the fluvial -lacustrine deposits sand soil has accumulate the watershed by wind, then, the surface water did not communicate with the water of the West Lamulun river basin, but the groundwater of the fossil Major Basin has seeping out to the West Lamulun river now, it shows that the watershed has not totally made final model, though it has been forming and evolving since that time. The hydraulic relation both the fossil Major Basin and the West Lamulun drainage basin still exists at present. By the RS and field survey of five branches of the West Lamulun river and the analysis of the geological structures and sedimentary cause, the article demonstrates that the West Lamulun river is the main channel that discharges the water resource in the fossil Major Basin. During the period of middle and late Pleistocene, the fierce orogenic zone upheaval changed the pattern of river system, it means that the plateau basin became a interior basin, meanwhile, the water system became a interior river system and lost the contact with the exterior river system around it. Since 40 or 50 thousand years ago, the orogenic zone started to rise fiercely, it not only changed the land form and river system pattern, but also controlled the formation and evolution of the West Lamulun river basin. It means that the great down-cutting action formed many "V"valleys. Then formed a good discharging channel for water. With the reduction of water resource, the fossil Major Basin gradually became a interior basin, the West Lamulun river shrank to east step by step. now only remnants existed imply the hydraulic relationship both the fossil Major Basin and the West Lamulun drainage basin. The upheaval of the plateau basin leaded the level difference value about 1000m, such great level difference made the huge water resource with high potential energy discharge along the exterior rivers like the west Lamulun river to the sea, during the period of several ten thousand years. These water resource with lots of sand and soil accumulated sediments at the middle and downreaches of the west Lamulun river, and formed the many fulivo-lacustrine basins like Kailu basin, Liao river basin and so on. So, the orogenic zone upheaval created the certain rule that the water resource in the fossil Major Basin discharged greatly. After mid-late Pleistocene, owing to the great upheaval and evolution of new tectonics movements made the natural geographical condition and modern climate pattern in this drainage basin, especially, with the development of the Tibetan Plateau Uplift, climate which is cold, semiarid, windy more and rain little has formed gradually in North China, the semi-tropical warm atmosphere from south with lots of water vapor is obstructed, meanwhile, since quaternary the climate has become arid gradually, the temperature rises, rainfall inclines , evaporation increases, the water resource could not be supplied in time, all these as the important climate factor result in the reduction of the water resource. Since historical date, man appeared on the land, nobody realized the natural trend that the water resource had been being inclined gradually, the grassland is made a resource for life. With the increase of population, societal change and transform, war, the development of industry and agriculture, excessive herding, much cutting wood, all these consume and waste great water resource, result land desertification seriously, then accelerate the reductive speed of water resource. So on the measure of the civilization history, the human activity are the key factor that influences the water resource change of the drainage basin. Article adopts the method of geology-history analysis proves that the root factor that influences the evolution of water resource is the natural factor, on the natural factor, the earth science factor is the base, the climate factor is a important cause that influences the water resource change. So, natural factor is the precondition and base of water resource change, its formation and evolution is a certain developing trend of the geographical history. Since civilized history, in the process of the water resource reduction, human activity accelerate the process. So, human activity becomes a key factor in the process of the West Lamulun Drainage basin shortage. By the analysis of all kinds of factors that influence the evolution of the Middle and Upper Drainage Basin, man already realizes the important sense of water resource for life. Through impersonal analysis, we put forward reasonable layouts and suggestions of restoration of water resource. the radical factors can not be changed, what man can do is to control human activity, wisely change climate condition , arduously increase rainfall. So we shall vigorously improve the strength of returning farm land to forest and grassland, protect and restore the eco-resource like the lakes and marshes, wetland and so on, make them contribute eco-function change the underlying surface condition, increase the area ofplanting forest and grass, reasonably harness the limit water resource , by sticking to for several ten years, we will improve the climate condition, increase rainfall, protect and restore the water resource dynamic cycling system, access to the aim of harmonious development of man and environment. By investigation, we obtain main fruits below: 1. Through survey with "3S"technology, the modern watershed of the Upper drainage basin of the West Lamulun river was formed several ten thousand years ago, and is not a final model, the original watershed is still to west, the fossil Major fulivo-lacustrine sedimentary basin should be a part of the West Lamulun Drainage Basin. 2. The fossil Major fulivo-lacudtrine sedimentary basin on the east-south region of Inner Mongolia autonomous region exists, during several 100 thousand years before late-Pleistocene, it had always a good three water dynamic cycling system, and is the resource region of the exterior rivers around the orogenic zone like the West Lamulun river, Luan river, Yongding river and so on. 3. The formation and upheaval of orogenic zone result in the down-cutting action of the West Lamulun river, and make the West Lamulun river become a main discharging channel for water resource of the fossil Major fluvial-lacutrine sedimentary basin. 4. In the process of reduction of the water resource in the upper drainage basin of the West Lamulun river, natural factor is radical, human activity is a key. During long period of geological history, the earth-science factor is the foundation, climate is important. Since the civilization history age, human activity become key factor in influencing the water resource reduction of the drainage basin. 5. Through the study of evolution of water resource in the middle and upper drainage basin of the West Lamulun river, we put forward series of reasonable suggestions, for example Returning farm land to forest and grass, restoring and protecting lakes moors and wetlands, reforming the eco-environmengt, changing the underlying surface condition, increasing the rainfall and so on. By the characteristics of landform and geological structures, we bring forward the reasonable hydraulic engineering. The series of suggestions is put forward after the study of objective analysis. The main new foundings and creating points is below: 1. We find that the west watershed of the west Lamulun river basin is not the original watershed of the primary drainage basin. The true watershed is on the west fringe of the fossil Major flucivo-lacustrine sedimentary basin. 2. The fossil Major flucivo-lacustrine sedimentary basin is verified, which was once a...
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