CAJ | 학술논문

由于满足人类生产生活的需求,人类对河道的开发利用使得河道水系变得纵横交错,在平原区的很多河道高程不断的变化,甚至河流流向变成了与原来相反;因此采用常规方法在利用DEM提取数字水系时就会产生断开或者假水系的情况.针对以上情况,本文建立了采用强可视化算法等方法进行DEM的处理及河系提取,具体为:首先在流域实际水系的基础上,提炼出可反映实际水系主要特征和过程的概化水系,其次对断开或不舍理处的DEM采用本文建立的强可视化算法进行分析,并采用缓冲区算法和双线性插值算法进行修改,最后对得到的DEM进行河系提取.运用以上方法,本文以天津市为倒进行了应用,并与传统算法和高程增量遮加方法提取的DEM水系相比较,结果表明该方法更适合平原区数字水系的提取,并能得到与实际情况吻合的水系.
유우만족인류생산생활적수구,인류대하도적개발이용사득하도수계변득종횡교착,재평원구적흔다하도고정불단적변화,심지하류류향변성료여원래상반;인차채용상규방법재이용DEM제취수자수계시취회산생단개혹자가수계적정황.침대이상정황,본문건립료채용강가시화산법등방법진행DEM적처리급하계제취,구체위:수선재류역실제수계적기출상,제련출가반영실제수계주요특정화과정적개화수계,기차대단개혹불사리처적DEM채용본문건립적강가시화산법진행분석,병채용완충구산법화쌍선성삽치산법진행수개,최후대득도적DEM진행하계제취.운용이상방법,본문이천진시위도진행료응용,병여전통산법화고정증량차가방법제취적DEM수계상비교,결과표명해방법경괄합평원구수자수계적제취,병능득도여실제정황문합적수계.
With the development of society, the river plain water effected by human activities has become the constant criss-crossing,the basin water cycle has changed, and the digital river extracted from its DEM became some shortages,such as disconnect or distortion.A strong visualization algorithm approach was developed in this paper to solve the problems. Firstly, according to the actual situation of river system,the digital elevation models(DEM) was pretreated by blocking up its basic values and using the method of iterative elevation increment advanced by Martz and Garbrecht.Secondly, through interactive analysis between simulating river system and abstracted river system by said pretreatments, some disconnected and illogical rivers were found,then analyzed by strong visualization algorithm which updated by us and buffer zones arithmetic,and its DEM was modified by double lines insert algorithm. The method was applied in Tianjin city,and the result indicates it makes a better river system than river system abstracted by traditional algorithm or models.