| Water is an essential part of human production and life elements,and human relations are inseparable,therefore the research of it is crucial Shenwu irrigation field located in the western Inner Mongolia hetao irrigation district,is an important grain production base,at the same time irrigation field contains more than 200 various lakes,according to the implementation of water saving reconstruction project of domain lake ecological water and the effect of geographic information system for the application of remote sensing principle of mathematical statistics,an shen wu irrigation field nearly 17 years to study the land use type,at the same time shen wu irrigation field eight typical natural lakes water quality and water level monitoring,2016 and2017,in the hope for future water saving reconstruction project to provide a more scientific theory basis This research mainly the following several aspects:1.Shen wu irrigation field data as the foundation,and the maximum likelihood method is used to support vector machine(SVM)method Artificial neural network,and its overall classification precision reaches 80%,classification of Kappa coefficient 0.830.87 0.89,respectively,in combination with in this paper,the research object so the use of artificial neural network for Shenwu irrigation field land use classification by the line extraction.2.Analysis of land use types from 2000 to 2017:the overall growth trend of cultivated land,forest land and residential land increased by 230.5km~2,214.5km~2and14.8km~2 respectively.The unutilized decline trend is the only one of all land use types that continues to decrease,with a decrease of 441.3km~2;In the year 2000 to 2017,the trend of the decrease in the water area after the first decrease,the fluctuation in 2007,and the overall decrease in the area,decreased by 18.5km~2 in 17 years.3.Analysis of 8 typical natural lakes from 2000 to 2017:the total area of irrigation area in 2000 was 88.34km~2,and the total area of the irrigation area in 2017 was 76.34,which was the smallest period in the area of nearly 17 years.From 2000 to 2017,the decrease of area was mainly concentrated in small lakes,and the area was reduced by5.47km~2,and the number of lakes with more than 0.5km~2decreased.4.Through the above-mentioned points of natural factors,social economic factors and water saving reconstruction project of research on the effects of shen wu irrigation lake in time and space domain,found that it is not affected by single factor,is affected by multi-factor comprehensive,long-term human activities and natural factors,and formed the Shenwu irrigation water-saving transformation domain unique spatial and temporal changes of the lake.The implementation of water saving reconstruction project,the reduction in diverted,and influencing factors of Shenwu irrigation lake in time and space domain,and its interaction,mutual influence,and in different periods,the influence degree is not the same.5.The main component analysis method was adopted to evaluate the water quality of 8 typical natural lakes in Shenwu irrigation district from 2016 to 2017,and its dynamic variation patterns were basically consistent with time.Water quality is best,3~5 month basic can achieve?class.The overall water quality of natural lakes decreased during the period from June to August,and the water quality of the lake was reduced to the category and class.From August to September,the water quality of the typical lake was the worst.From October to November,the water quality of 8 typical natural lakes in the upper stage of the lake was once again reached.The implementation year of water saving reconstruction project has a certain negative effect on the water quality of the lake near the channel,mainly in June to October,which has no obvious influence on the water quality of other months. |
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