| GIS支持下岷江上游水文特征空间分析 |
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| 引用本文： | 曾超,赵景峰,李旭娇.GIS支持下岷江上游水文特征空间分析[J].水土保持研究,2011,18(3):5-9,14. |
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| 作者姓名： | 曾超 赵景峰 李旭娇 |
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| 作者单位： | 1. 四川师范大学,地理与资源科学学院,成都,610101
2. 成都理工大学,遥感与GIS研究所,成都,610059 |
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| 基金项目： | 国家科技重大专项项目，四川师范大学灾后重建专项课题 |
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| 摘 要： | 流域水文特征的提取与分析不仅为水文过程模拟提供重要参数,而且是研究水土流失和制定防洪减灾措施的基础依据。以岷江上游90 m分辨率的DEM数据为基础,利用GIS手段提取了分水岭、流域面积以及河流长度等河网基本信息,并对流域内的干流和主要支流的河网密度、河道纵剖面等特征进行了定量分析。又据1982-1987年间岷江上游地区的21个雨量站的降水资料和同时期8个水文站的逐年径流量数据,对该流域及其主要子流域的径流系数进行了计算。结果表明:岷江上游流域的平均径流系数为0.77,各子流域的径流系数从北面镇江关流域的0.55递增至南面姜射坝水文站以下流域的0.88。流域的河网密度为0.172 km/km2,其各子流域变化范围为0.165~0.177 km/km2。干流河道平均比降为9.7‰,自北向南分布的5条支流的纵剖面凹曲度和比降均呈增加趋势,且主河道剖面形态受构造运动影响显著。
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| 关 键 词： | GIS 岷江上游 水文特征 空间分析 |
Spatial Analysis of Hydrological Characteristics of the Upper Reaches of Minjiang River Based on GIS Technology |
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| ZENG Chao,ZHAO Jing-feng,LI Xu-jiao.Spatial Analysis of Hydrological Characteristics of the Upper Reaches of Minjiang River Based on GIS Technology[J].Research of Soil and Water Conservation,2011,18(3):5-9,14. |
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| Authors: | ZENG Chao ZHAO Jing-feng LI Xu-jiao |
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| Institution: | ZENG Chao1,ZHAO Jing-feng1,LI Xu-jiao2(1.College of Geography and Resources Science,Sichuan Normal University,Chengdu 610101,China,2.Institute of RS & GIS,Chengdu University of Technology,Chengdu 610059,China) |
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| Abstract: | Hydrological characteristics are not only the basis for water cycle and soil erosion research,but also can provide beneficial support to avoid geological and flood hazards.This research extracted river network information and watershed of upper Minjiang River Basin by GIS tools from digital evaluation model(DEM) with 90 m resolution,and analyzed drainage system density,longitudinal channel profiles of main channel and major tributaries quantitatively.Then we calculated runoff coefficient of the drainage bas... |
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| Keywords: | GIS |
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