GIS ANALYSIS OF AVERAGE MONTHLY SPECIFIC RUNOFF IN SLOVENIA

Peter FRANTAR, Irena Rejec BRANCELJ

Abstract


Water cycle research is the basis of any water management and one of most important elements is the runoff. In environmental analyzes the most commonly used is the annual specific runoff. Due to increasing environmental awareness the need for better seasonal runoff knowledge is crucial to support the decision making processes in order to improve the sustainable water resources management. The water quantity is crucial for all environmentally based water management. For water vulnerability analyzes the specific runoff can be taken into account as water sensitivity indicator. Since the runoff is varying in time and space the average annual runoff is not always enough, the substantial improvement can be achieved with the use of seasonal or monthly runoff. With the use of GIS we joined the results of two hydrological analyzes: water balance and river flow regimes. We used kriging to transform the point data of discharge coefficients in order to create continuous spatial distribution of the variable as a raster. To compute long-term average monthly specific runoff raster we used mathematical functions in GIS to combine the long-term specific runoff raster and the monthly discharge coefficients. The final results are 12 raster maps of monthly discharge coefficients and 12 maps of long-term monthly specific runoff.


Keywords


hydrology; specific runoff; river flow regime; kriging; GIS

Full Text:

PDF

References


de Smith, M.J., Goodchild, M.F., Longley, P.A.: Geospatial Analysis - a comprehensive guide. 3rd edition. Splint – Spatial Literacy in Teaching, Matador, Leicester, UK. Internet: http://www.spatialanalysisonline.com/ (5/2/2010), 2009.

Frantar, P. (ed.): Water Balance of Slovenia 1971 – 2000 (Vodna bilanca Slovenije 1971 – 2000). Ministry for environment and spatial planning, Slovenian Environment Agency, Ljubljana. 2008

Frantar, P., Hrvatin, M.: Discharge regimes in Slovenia in period 1971-2000 (Pretočni režimi v Sloveniji med letoma 1971 – 2000). Geografski vestnik 77-2, 115 – 127. Ljubljana, 2005.

Frantar, P.: Discharge regimes of Slovenia’s rivers and its variability (Pretočni režimi slovenskih rek in njihova spremenljivost). Ujma 19. Ljubljana, 2005.

Hrvatin, M.: Discharge regimes in Slovenia (Pretočni režimi v Sloveniji). Geografski zbornik 38. Ljubljana, 1998.

IWP – Iowa Water Pollution: http://www.extension.iastate.edu/publications/ian103.pdf 2001 (16/10/2009).

Kastelec, D., Košmelj, K.: Spatial Interpolation of Mean Yearly Precipitation using Universal Kriging. Developments in Statistics, Metodološki zvezki, 17, 149 - 162, Ljubljana, 2002.

Kolbezen, M., Pristov, J.: Surface streams and water balance of Slovenia (Površinski vodotoki in vodna bilanca Slovenije). Hydrometeorological institute of Slovenia. Ljubljana, 1998.

Mikoš, M., Kranjc, A., Matičič, B., Müller, J., Rakovec, J., Roš, M., Brilly, M.: Terminology in hydrology (Hidrološko izrazje). Acta Hydrotechnica 20/32, Ljubljana, 2002.

Plut, D.: Geography of water resources (Geografija vodnih virov). Filozofska fakulteta, Oddelek za geografijo. Ljubljana, 2000.

Plut, D.: Geographical methods of environment degradation research (Geografske metode proučevanja degradacije okolja). Department of Geography, Faculty of Arts, Ljubljana, 2004.

Stele, A.: River regimes in Slovenia (Rečni režimi v Sloveniji). Hydrometeorological institute of Slovenia,. Ljubljana, 1987.

Špes, M., Cigale, D., Lampič, B., Natek, K., Plut, D., Smrekar, A.: Environmental vulnerability study (methodology and application) (Študija ranljivosti okolja (metodologija in aplikacija)). Geographica Slovenica, 35/1-2. Založba ZRC, Ljubljana, 2002.

Wikipedia: Kriging. Internet: http://en.wikipedia.org/wiki/Kriging, 2010 (4/2/2010).

Zagmajster, M., Sket, B., Culver, D.C.: The distribution of species diversity of subterranean bugs using interpolation methods (Prikaz razporeditve vrstne pestrosti podzemeljskih hroščev z uporabo interpolacijskih metod). Geografski informacijski sistemi v Sloveniji 2007 – 2008, 237 – 245, ed. Perko et al., Založba ZRC, Ljubljana, 2008.

ESRI: ArcGIS Desktop Help 9.2¸. Release 9.2 Last Modified March 15, 2007. Environmental Systems Research Institute, Inc. Internet: http://webhelp.esri.com/arcgisdesktop/9.2/index.cfm?TopicName=welcome, 2007 (5/2/2010).




DOI: http://dx.doi.org/10.15551/scigeo.v59i2.208

Refbacks

  • There are currently no refbacks.



ISSN: 1223-5334; eISSN: 2284-6379. Published in Romania

 

LIBRARY OF CONGRESS ONLINE CATALOG Geoscience e-journal

 


Large Visitor Globe