基于Arcpy自动提取清涧河流域水系特征  

Automatic Extraction of Drainage Characteristics of Qingjian River Basin Based on Arcpy

作　　者：何灿灿 徐翠玲[1] 宋敦江[2] HE Cancan XU Cuiling SONG Dunjiang(School of Earth Science and Resources, Chang＇an University, Xi＇an 710054, Shaanxi, China Institute of Policy and Management, Chinese Academy of Sciences, Beijing 100190, China)

机构地区：[1]长安大学地球科学与资源学院,陕西西安710054 [2]中国科学院科技政策与管理研究所,北京100190

出　　处：《水力发电》2017年第3期30-33,共4页Water Power

基　　金：中央高校基金资助项目(310827161014)

摘　　要：水系特征的提取是进行流域水文分析的基础,快速、有效地获取流域水系信息是水文分析的内在需求。依据Arcpy可以用Python语言调用ArcGIS地理工具的特点,提出了一种基于Arcpy自动提取水系特征的方法。首先,确定水系特征提取工具和模块;其次,根据ArcHydro提取流程编写脚本;最后,运行程序成功提取出清涧河流域水系特征。实验表明,基于Arcpy自动提取水系的方法是切实可行的。提取不同阈值下的清涧河水系与1∶25万数字化水系对比结果也显示,当阈值为4.05 km^2时提取的河网与实际水系较吻合。The extraction of drainage characteristics is the basis of basin hydrologic analysis and the quick and effective basin information acquisition is the inherent requirements of hydrologic analysis. As Arcpy can use Arc GIS processing tools with Python, an Arcpy-based method that can automatically extract drainage characteristics is proposed. Firstly, the method determines drainage tools and modules. Then, the script is written according to Arc Hydro. Finally, the drainage characteristics of Qingjian River are got by running the program. The experiment proves that the method is feasible. Compared the drainage system which is under six thresholds with 1 ∶ 250 000 digital drainage, it is concluded that the most suitable threshold is4. 05 km^2.

关 键 词：水系特征 自动提取 Arcpy ArcHydroTools 清涧河流域 

分 类 号：P331[天文地球—水文科学]