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Enhancing Water Pathway Management for Agricultural Sustainability: Insights from ARVALIS Workshop

This document explores insights from the ARVALIS-Institut du Végétal workshop held on April 26, 2012, in Brussels, focusing on agricultural water pathway management. Key topics include diagnostic tools for assessing and managing water runoff, leaching, and contaminants like pesticides. It outlines methodologies for identifying effective buffer zones, evaluating soil permeability, and assessing landscape factors impacting water flow. The findings emphasize the integration of best management practices (BMPs) tailored to specific water flow paths, promoting sustainable agricultural practices and effective decision-making to mitigate risks.

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Enhancing Water Pathway Management for Agricultural Sustainability: Insights from ARVALIS Workshop

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  1. Diagnosisrunoff concept Julie Maillet-Mezeray, Benoît Réal Arvalis-Institut du Végétal, France EU Stakeholder Workshop, 26th April 2012, Brussels

  2. Flow theme • Different water pathways • Datas needed to assess water pathways • Existing audit methodology • Decision support tools to help decisionmaking

  3. Linking water pathway and mitigation measures • Different water flow paths • Possible ways of transfer for potential pollutants • BMP options adapted to type of water flow path Surface Run off Soil surface Permeability disruption Lateralseepage or drainage Leaching

  4. Audit methodology • Diagnosistool to prevent the contamination of water by pesticides atfieldscale • Diagnosistool to locate and size buffer zones Based on french approach (ARVALIS – Institut du végétal + CORPEN + IRSTEA) OptimizedamongProwadispartners, focusing on runoff

  5. - sol argileux sauf sol argileux Audit methodologyatplot scale 1 2 Data collection Identification of water circulation and exposed water Landscape, farm description, types of soil, geology… with the farmer Hydrologycategorisationattheplotscale Method 5 3 Assesseffect of practices Propose adaptedsolutions 4 • Soil management • Cropping practices • Adapting PPP and timing • Vegetative buffer • Wetlands Tillage practices, application periods and PPP Used Duringbothspring and winter time Riskassessment Linking water circulation at plot scalewithin the catchment Developed by ARVALIS-Institut du végétal : : AQUAPLAINE® Based on CORPEN methodology

  6. Identify water circulation (step 2)

  7. Data to integrate (step 2) Soil: Texture, permeability of the surface horizon, coarse fragments and shrinkage cracks Soil saturation period Meteorological data + Substrate: Depth, break in permeability and inclination Type of water flow in the soil Direction in which the water is flowing + Landscape: Slope and sinkholes Buffer zones + Effect of practices on water flow Cultivation data Crop, date sown and crop rotation Tillage pan Adjustments: Drainage and drain performance Intensity of water flow

  8. Field observations: concentratedrunoff 2012 Source : G.Le Hénaff - IRSTEA 2012 Source : G.Le Hénaff - IRSTEA

  9. Field observations: runoff by capping

  10. Field observationson buffer zones Source : G.Le Hénaff - IRSTEA

  11. Local conditions, local results Example 2 Example 1 Adapte mitigation measures to pathways Drainage Surface runoff, erosion No risk Catchment of la Nonette Catchment of agripéron

  12. Scale of diagnosis case study 2012 JMM - ARVALIS

  13. Scale of diagnosis case study

  14. Support risk assessment Catchment + field diagnosis observations DETERMINE RISK SITUATION

  15. Decisiontreesparametrization Description of the characteristic of the soil - clayey and loamy soils (>35% clay, <30% sand) - swelling clays >25% - capping soils Rest Description of risk level and bunch of proposals

  16. Integratingcrop practices Soil management No-till Disk tillage Ploughing Vegetation cover Covered limited cover No cover

  17. Concentratedrunoff

  18. Differentscales for the diagnosis Area Catchment

  19. Conclusion • Field audit needed • Methodologyavailable • Help tool to support audit: decisiontrees in progress Practical, acceptable, implementable

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