GMDH-based decision-making support for ecological processes. Vladimir A. Vissikirsky, Volodymyr S. Stepashko, and Ioannis K. Kalavrouziotis

Abstract. The paper considers the issues concerning the decision-making support on the basis of GMDH modeling and qualitative assessment applied for environmental tasks in agriculture. As an example, the task of irrigation of forest plant species under different conditions was studied here for the purpose to understand behavior of the plant species and select the best irrigation conditions. This task implies four main stages of the decision-making support: 1) Stage of experimental study; 2) Stage of making the conclusion about the possibility to implement the results of study into the real-word applications; 3) Stage of the development of monitoring and control techniques; 4) Stage of implementation. The GMDH was applied to estimate different aspects of plant species behavior, provide the basis for qualitative assessment, obtain general models that describe combinations of irrigation regimes, as well as to establish the control procedures for suitable or optimum irrigation processes. Qualitative assessment was intended to facilitate clear understanding of the experimental results, easily classify different irrigation/plant species cases and identify the best ones.

Keywords. GMDH, qualitative assessment, decision-making, environment, agriculture, irrigation, wastewater

References.
1. Kalavrouziotis I. K., Stepashko V. S., Vissikirsky V. A., Drakatos P.A.: Group Method of Data Handling (GMDH) application for modelling of mechanical properties of trees irrigated with wastewater. International J of Environment and Pollution, p. 589-601, 18 (6), 2002.
2. Kalavrouziotis I. K., Stepashko V. S., Vissikirsky V. A., Drakatos P.A.: Group Method of Data Handling (GMDH) in modelling of growth dynamics of tress irrigated with wastewater. International J of Environment and Pollution, p. 350-364, 21 (4), 2004.
3. Vissikirsky V.A., Stepashko V.S., Kalavrouziotis I.K., Drakatos P.A.: Growth Dynamics of trees Irrigated with wastewater: GMDH Modeling, Assessment and Control Issues. Instrumentation Science and Technology, p. 229-249, 33 (2), 2005.
4. Kalavrouziotis I. K., Pantazis V. N., Vissikirsky V. A., Stepashko, V. S.: Irrigation of Forest Species with Wastewater and Sludge: Experiments, Modeling, and Qualitative Assessment, Instrumentation Science and Technology, p. 727-742, 34, 2006.
5. Vissikirsky V.A., Stepashko V.S., Kalavrouziotis I.K., Varnavas S.P.: The Road Pollution Impact on Zea mays: Inductive Modeling and Qualitative Assessment. Water, Air & Soil Pollution, Published online: 3 June 2008, 2008.
6. Vissikirsky, V.A., Stepashko, V.S., Kalavrouziotis, I.K.: Application of GMDH to the Environmental Modeling with Short Samples, Proceedings of International Workshop on Inductive Modeling (IWIM 2007), Prague, 22-26 September, pp. 18-25, 2007.