IASMHYN: A web tool for mapping Soil Water Budget and agro-hydrological assessment trough the integration of monitoring and remote sensing data

Climate change, increasing pressure on farmland to satisfy the growing demand, and need to ensure environmental quality for agriculture in order to be competitive require an increasing capacity of water management. In this context, web-based for forecasting and monitoring the hydrological conditions of topsoil can be an effective means to save water, maximize crop protection and reduce soil loss and the leaching of pollutants. Such tools need to be targeted to the users and be accessible in a simple way in order to allow adequate take up in the practice. IASMHYN "Improved management of Agricultural Systems by Monitoring and Hydrological evaluation" is a web mapping service designed to provide and update on a daily basis the main water budget variables for farmland management. A beta version of the tool is available at www.gecosistema.com/iasmhyn . IASMHYN is an instrument for "second level monitoring" that takes into account accurate hydro-meteorological information's from ground stations and remote sensing sources, and turns them into practically usable decision variables for precision farming, making use of geostatistical analysis and hydrological models The main routines embedded in IASMYHN exclusively use open source libraries (R packages and Python), to perform following operations: (1) Automatic acquisition of observed data, both from ground stations and remote sensing, concerning precipitation (RADAR) and temperature (MODIS-LST) available from various sources; (2) Interpolation of acquisitions through regression kriging in order to spatially map the meteorological data; (3) Run of hydrological models to obtain spatial information of hydrological soil variables of immediate interest in agriculture. The real time results that are produced are available trough a web interface and provide the user with spatial maps and time series of the following variables, supporting decision on irrigation, soil protection from erosion, pollution risk of groundwater and streams: - Daily precipitation and its characteristics (rain, snow or hail, rain erosiveness); - Maximum, minimum and average daily temperature; - Soil Water Content (SWC); - Infiltration into the deep layers of the soil and surface runoff; - Potential loss of soil due to erosion - Residence time of a possible chemical (pesticides, fertilizers) applied to the soil. Thematic real time maps are produced give the user support decision on irrigation, soil management and pesticide/fertilizer application. The ongoing project will also lead to validation and improvement of estimates of hydrological variables from satellite imagery and radar data. The tool has been cross-validated with estimates of evapotranspiration and soil water content in agricultural sites in South Tyrol (Italy) in the framework of MONALISA project (http://www.monalisa-project.eu). A comparison with physical based models, satellite imagery and radar data will allow further generalization of the product. The ultimate goal of the tool is to make available on the market a service that is generally applicable in Europe , using commonly available data, to provide single farmers and organizations effective and up to date information for planning and programming their activities.