Development of Index to Assess Drought Conditions Using Geospatial Data a Case Study Of Jaisalmer District, Rajasthan, India

• Autorzy: Chhajer V. , Prabhaka S. , Prasad P. R. C.

Identyfikatory

DOI

10.1515/gein-2015-0003

Warianty tytułu

PL

Opracowanie wskaźnika oceniającego stopień suszy z wykorzystaniem danych georeferencyjnych na przykładzie okręgu Jaisalmer w Radżastanie (Indie)

• Języki publikacji: EN

Abstrakty

EN

The Jaisalmer district of Rajasthan province of India was known to suffer with frequent drought due to poor and delayed monsoon, abnormally high summer-temperature and insufficient water resources. However flood-like situation prevails in the drought prone Jaisalmer district of Rajasthan as torrential rains are seen to affect the region in the recent years. In the present study, detailed analysis of meteorological, hydrological and satellite data of the Jaisalmer district has been carried out for the years 2006−2008. Standardized Precipitation Index (SPI), Consecutive Dry Days (CDD) and Effective Drought Index (EDI) have been used to quantify the precipitation deficit. Standardized Water-Level Index (SWI) has been developed to assess ground-water recharge-deficit. Vegetative drought indices like Vegetation Condition Index (VCI), Temperature Condition Index (TCI), Vegetation Health Index (VHI), Normalized Difference Vegetation Index (NDVI) and Modified Soil-Adjusted Vegetation Index 2 have been calculated. We also introduce two new indices Soil based Vegetation Condition Index (SVCI) and Composite Drought Index (CDI) specifically for regions like Jaisalmer where aridity in soil and affects vegetation and water-level.

PL

Okręg Jaisalmer w indyjskiej prowincji Radżasthan znany był z częstych susz, spowodowanych słabymi i pojawiającymi się zbyt późno opadami monsunowymi, wyjątkowo wysokimi temperaturami w lecie i niewystarczającą ilością zasobów wodnych. Jednakże ostatnio, w podatnym na suszę okręgu Jaisalmer w Radżasthanie, częstsze jest zagrożenie ze strony powodzi, spowodowanych ulewnymi deszczami. W niniejszej pracy przedstawiono szczegółową analizę danych meteorologicznych, hydrologicznych i satelitarnych z okręgu Jaisalmer, zgromadzonych w latach 2006−2008. Aby ilościowo opisać deficyt opadów, użyto następujących wskaźników: standaryzowany wskaźnik opadów (Standardized Precipitation Index – SPI), ciągły wskaźnik dni suchych (Consecutive Dry Days – CDD) oraz efektywny wskaźnik suszy (Effective Drought Index – EDI). Aby ocenić deficyt wód grunto wych, opracowano standaryzowany wskaźnik poziomu wód (Standardized Water-Level Index – SWI). Obliczono wskaźniki suszy wegetacyjnej takie jak: wskaźnik stanu wegetacji (Vegetation Condition Index – VCI), wskaźnik stanu temperatury (Temperature Condition Index – TCI), wskaźnik zdrowia wegetacji (Vegetation Health Index – VHI), znormalizowany różnicowy wskaźnik wegetacji (Normalized Difference Vegetation Index – NDVI) oraz zmodyfikowany wskaźnik wegetacji z uwzględnieniem poprawki na glebę – wskaźnik wegetacji 2 (Vegetation Index 2). Wprowadzono również dwa nowe wskaźniki: oparty na glebie wskaźnik stanu wegetacji (Soil based Vegetation Condition Index – SVCI) i złożony wskaźnik suszy (Composite Drought Index – CDI), uwzględniając specyfikę dla regionów takich jak Jaisalmer, gdzie suchość w glebie ma wpływ na wegetację i poziom wód.

Słowa kluczowe

EN

drought; remote sensing indices; precipitation; NDVI; Jaisalmer

PL

susza; wskaźniki teledetekcyjne; opady; NDVI; Jaisalmer

• Wydawca: Polska Akademia Umiejętności
• Czasopismo: Geoinformatica Polonica
• Rocznik: 2015
• Tom: T. 14
• Strony: 29--39
• Opis fizyczny: Bibliogr. 37 poz., rys.

Twórcy

autor

Chhajer V.

• Lab for Spatial Informatics, International Institute of Information Technology, Gachibowli, Hyderabad – 500032

autor

Prabhaka S.

• Lab for Spatial Informatics, International Institute of Information Technology, Gachibowli, Hyderabad – 500032

autor

Prasad P. R. C.

• Lab for Spatial Informatics, International Institute of Information Technology, Gachibowli, Hyderabad – 500032

Bibliografia

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Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.