Water balance and settlements in the N.W. dry zone of Sri Lanka

agronomic characters asia asie balance de provisiones bilan d'approvisionnement bilan hydrique clima climat climate climatic zones commercialisation condiciones ambientales condition de milieu efficiency eficacia engineering environment environmental conditions environnement fisiologia fonction physiologique hydraulic engineering marketing medio ambiente mercadeo physiological functions physiologie physiology productividad productivity profitability rendement rendimiento rentabilidad site factors supply balance water balance yields zone climatique zone semi-aride