Buried clay pot irrigation for efficient and controlled water delivery

作者：Vasudevan Padma^*; Thapliyal Alka; Sen P K; Dastidar M G; Davies Philip

来源：Journal of Scientific & Industrial Research, 2011, 70(8): 645-652.

• Hydraulic conductivity
• Moisture deficit
• Pitcher irrigation

This study presents water flow (WF) into soil from several pitchers buried in the soil up to their neck and filled with water, under natural atmospheric conditions for a period of two years. Variation in daily WF into soil indicated a direct correlation with moisture deficit (MD) in atmosphere. WF increases linearly with MD for non rainy days. WF without hydraulic head through all pots varied in the order air > soil > water. Base line flow in water with respect to air was < 5%. WF for pots with hydraulic head was also in the order air > soil > water, but with significant increase in WF. Hydraulic conductivity K, was in the order air > soil > water. K(s) in water was independent of MD, whereas for air and soil, K, increased with MD. Thus total WF is partially under hydraulic head and partly due to pull effect through capillary pores on pot wall either due to MD in air or prevailing soil water tension in soil.

• 出版日期2011-8