00565    a2200169   4500020001500000082001500015100002300030245009700053260007100150300001800221440004200239650002300281650002400304700002400328700002100352700002200373  a9290903244  a631.7bNAT  aSakthivadivel, R.   aNature of small tank cascade systems and a framework for rehabilitation of tanks within them  aColombobInternational Irrigation Management Institutec1996g1996  axi,54p.c21cm  aIIMI country paper, Sri Lanka  No. 13  aWATER CONSERVATION  aSPECIFIC TECHNIQUES  aWijayaratna, C. M.   aFernando, Nihal   aPanabokke, C. R.