Study On Low-flow Resoueces And Low-flow Resource Carrying Capacity In Karst Basin By Means Of GIS And RS

Karst drainage is a regional synthetical whole which is made up of uniquegeomorphy—river net structure and hydrologic dynamic process . Thus, there are complicatedand diversified factors that influence the low-flow resource of Karst drainage. In addition toclimate etc,There are also important factors of Vegetable types,Land-use types,Rock types andGeomorphologic types to the Karst drainage low-flow resoure.According to it,this paper is basedon describing the home and overseas study of the water resource and water resource carryingcapacity,and bring out the study of the Karst drainage low-flow resource and low-flow carryingcapacity. Three main contents were researched about the low-flow resource and low-flow resourcecarrying capacity in karst region.Firstly, my paper analysized the main factors which influencethe low-flow resource in karst region such as Vegetable types,Land-use types,Rock types andGeomorphologic types etc from the point view of drainage structure. The relationship bothnatural factors and low-flow resources are researched emphatically by the grey theory in mypaper, which make the conclusion of different contribution rates of different natural factors tolow-flow resources.Secondly, interpret the water-bearing status of drainage-base substance fromTM,according to the water-bearing spectral features,using GIS and RS technologies,based on thesurveying hydrologic data,and build up the projectional mathematical model of the Karstdrainage low-flow resource, in order to solve the calculation of the amount of low-flow resourcesin no documents and data regions.Thirdly, pose the concept of the Karst drainage low-flowresource carrying capacity,namely,passing through rational optimal arrangement,low-flowresources can supply the most capacity to industrial and agricultural productions,people livingand ecological environment protections etc,under a concrete historical developmental stage,based on predictive technology, economy and social development,by the principle of sustainabledevelopment, under the condition of the maintenance ecological environment innocuous cycles,viz,the most development capacity of low-flow resources.to analyse preliminarily the meaningand characteristics of low-flow resource carrying capacity. To establish the index system oflow-flow resource of Karst region from the supply-demand relationship of low-flowresources;To approach the theory of the low-flow resource carrying capacity of Karstdrainage,and set up a mathematical model fitting to the low-flow resource carrying capacity ofKarst drainage. At last, taking the example of Guiyang City ,to calculate the status of low-flow resourcecarrying capacity as to the different water-use objects and types at present and in a few years.theresearch show:at the whole point view of Guiyang, the carrying capacity of industry was justenough at 2003, coming to "collectivity wealth" at 2013,and being all over-carry at 2018. thecarrying capacity of agriculture, being just enough at 2003,will come elemenrarily to basicallyaffluent. the carrying capacity of city and rural area life, being just enough at 2003,will getelemenrarily up to basically affluent at 2018. the carrying capacity of GDP , being just enough at2003,will have achieved "all-sided wealth" at 2018.this mean that the carrying capacity oflow-flow resources in Karst region are lower,and that the low-flow resources have been one offactors which hamper seriously Guiyang social and economic development.