排序方式: 共有6条查询结果,搜索用时 15 毫秒
1
1.
探讨使用长江口的河口海岸数据,提出一套数据结构标准和服务框架,构建一个具有多源数据统一集成管理,适用于本地存储及网络呈现的数据服务平台。基于XML技术通过数据库实现数据的集中存储管理,基于FLEX通过WebGIS实现各种数据在线管理,从而提供一个具有统一的组织结构的综合数据管理服务的解决方案,给长江口的河口海岸的学科基... 相似文献
2.
通过与陕西省文物局合作,以不可移动文物中的古塔为例,利用FLEX技术建立基于B/S架构的Web地理信息系统,能够实现跨平台的文物数据存储和管理,利用自身优势为文物保护工作提供技术支持。 相似文献
3.
4.
The importance of aspect for modelling the hydrological response in a glacier catchment in Central Asia 总被引:2,自引:0,他引:2
下载免费PDF全文
![点击此处可从《水文研究》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Hongkai Gao Yongjian Ding Qiudong Zhao Markus Hrachowitz Hubert H.G. Savenije 《水文研究》2017,31(16):2842-2859
Understanding how explicit consideration of topographic information influences hydrological model performance and upscaling in glacier dominated catchments remains underexplored. In this study, the Urumqi glacier no. 1 catchment in northwest China, with 52% of the area covered by glaciers, was selected as study site. A conceptual glacier‐hydrological model was developed and tested to systematically, simultaneously, and robustly reproduce the hydrograph, separate the discharge into contributions from glacier and nonglacier parts of the catchment, and establish estimates of the annual glacier mass balance, the annual equilibrium line altitude, and the daily catchment snow water equivalent. This was done by extending and adapting a recently proposed landscape‐based semidistributed conceptual hydrological model (FLEX‐Topo) to represent glacier and snowmelt processes. The adapted model, FLEXG, allows to explicitly account for the influence of topography, that is, elevation and aspect, on the distribution of temperature and precipitation and thus on melt dynamics. It is shown that the model can not only reproduce long‐term runoff observations but also variations in glacier and snow cover. Furthermore, FLEXG was successfully transferred and up‐scaled to a larger catchment exclusively by adjusting the areal proportions of elevation and aspect without the need for further calibration. This underlines the value of topographic information to meaningfully represent the dominant hydrological processes in the region and is further exacerbated by comparing the model to a model formulation that does not account for differences in aspect (FLEXG,nA) and which, in spite of satisfactorily reproducing the observed hydrograph, does not capture the influence of spatial variability of snow and ice, which as a consequence reduces model transferability. This highlights the importance of accounting for topography and landscape heterogeneity in conceptual hydrological models in mountainous and snow‐, and glacier‐dominated regions. 相似文献
5.
基于“天地图”的地图数据服务,接入了江苏全省72个空气监测站点的实时监测数据,设计和实现了江苏省城市空气质量PM2.5监测数据平台。该平台的建成引起了较大的社会关注,成为“天地图”服务于环保行业和政府部门的又一成功案例。 相似文献
6.
1