Indicator testing and evaluating

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Presentation transcript:

Indicator testing and evaluating SEGURA PRB Indicator testing and evaluating Adolfo Mérida Abril Javier Gras Treviño 20-21 jun 2011, London

Soil Moisture Index Information on soil moisture is presented in form of soil suction (pF) values of the top soil layer: forces necessary for plants to apply in order to extract water from the soil for their use. It incorporates variations in the water holding capacity of different soil types and thus allows for comparison of the soil water status at different locations throughout Europe. Information on soil moisture is also presented in form of Soil Moisture Anomaly, obtained using the Gamma distribution, monthly and annual The spatial resolution is 5Km. Data are collected every 10 days, 3 images per month. Monthly averages have been assessed. This indicator might be affected by non natural factors when assessed in irrigated areas, therefore, the area must be carefully selected. Anomalies depend on the length of the time series used to calculate the long-term average. 21 years length time series is used, with data from 1990 to 2011 kindly provided by JRC. Soil moisture anomaly obtained in the Segura River Basin shows deviations from normal trends. Monthly values are a bit erratic but drought trends are properly represented. The index applied in the Segura River Basin identifies the drought period suffered in the Basin during the mid 90’s, although it doesn’t describe it as deep as it was. Furthermore the last drought period of the Basin, which took place from 2005 to 2009, does not seem to be properly described by the indicator. 20-21 jun 2011, London

Soil Moisture Index: factsheet update UPDATES: Detailed data have been kindly provided by JRC Longer time series for Soil Moisture monthly anomaly has been obtained for the whole Segura RB. Soil moisture Annual anomaly has been assessed for the whole Segura RB 20-21 jun 2011, London

Soil Moisture Index DRY PERIODS IDENTIFIED BY SEGURA DROUGHT MANAGEMENT PLAN Dry period not identified by Segura Drought Management Plan. 20-21 jun 2011, London