An Artificial Stream Network and Its Application on Exploring the Effect of DEM Resolution on Hydrological Parameters

Presented the results of long-term studies of diatoms and aquatic palynomorphs in surface sediments of the Arctic seas and the possibility of their use for the reconstructions of paleocirculation water masses, advection of Atlantic and Bering sea water into the Arctic ocean, changes in the river runoff to the seas, sedimentary processes in the marginal filter of the largest rivers, seasonal sea ice cover and other hydrological parameters.

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A multi-source approach to hydrologic parameter estimation in urban basins

Water Science & Technology ◽

10.2166/wst.1995.0052 ◽

1995 ◽

Vol 32 (1) ◽

pp. 233-239

Author(s):

Néstor A. Campana ◽

Eduardo M. Mendiondo ◽

Carlos E. M. Tucci

Keyword(s):

Open Space ◽

Remote Sensing And Gis ◽

Metropolitan Region ◽

Basic Information ◽

Bare Ground ◽

Porto Alegre ◽

Rainfall Events ◽

Thematic Map ◽

Hydrological Parameters ◽

Source Data

A procedure for estimating hydrological parameters is presented which combines a) remote sensing and GIS techniques with b) data extracted from site visits to city districts; the estimate so obtained is compared with estimates from rainfall data. It is developed in urban sub-basins of Dilúvio Basin in the metropolitan region of Porto Alegre, Brazil. A Fuzzy Algorithm which performs within sub-pixel level is used. Cover classes studied are: highly and slightly impervious, bare ground, grassed open space, and forest. A soil thematic map is determined based on pedological studies. A final distributed thematic map of potential runoff is obtained by superimposing previous data. It is compared with lumped runoff potential from rainfall events in sub-basins. These broad multi-source data hold basic information to develop an alternative strategy for hydrologic studies in urban basins.

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Geomorphology and Landslide-Prone Area in Cisolok District, Sukabumi Regency

E3S Web of Conferences ◽

10.1051/e3sconf/201912501005 ◽

2019 ◽

Vol 125 ◽

pp. 01005 ◽

Cited By ~ 1

Author(s):

Mochamad Seandy Alfarabi ◽

Supriatna ◽

Masita Dwi Mandini Manessa ◽

Andry Rustanto ◽

Yoanna Ristya

Keyword(s):

Land Use ◽

Road Network ◽

Geological Structure ◽

Overlay Analysis ◽

Stream Network ◽

Prone Area ◽

Steep Topography ◽

Physical Variables ◽

Natural Characteristics ◽

Very High

Sukabumi District located in Southern West Java known as a region that has diverse natural characteristics, however, it is vulnerable to disasters, especially landslides. Moreover, this study focuses on Cisolok District because this region always occurred landslides every year due to topography aspect. The aim of this study is to analyze the influence of geomorphology to landslide-prone area in Cisolok District to reduce landslides. This study used overlay analysis for geomorphology mapping, while the Frequency Ratio (FR) method used for landslide-prone area mapping. Several physical variables used in this study such as slope, elevation, lithology, geological structure, road network, stream network, land use, soil type, rainfall, and landslide location. The result shows that the study areas have diverse geomorphology units dominated by volcanic slope with steep topography. While landslide-prone area consist of four classes : namely 17,03% low, 62,05% medium, 14,4% high, and 6,51% very high. Variety of landslide vulnerability in study area influenced by terrain form, land genesis, and geomorphic process.

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