“ANALYSIS OF LOSS WATER ON PIPE DISTRIBUTION ”NON REVENUE WATER (NRW)” NETWORK PDAM SURYA SEMBADA CITY OF SURABAYA WITH CAUSAL LOOP DIAGRAM (CLD): ANALYSIS OF LOSS WATER ON PIPE DISTRIBUTION ”NON REVENUE WATER (NRW)” NETWORK PDAM SURYA SEMBADA CITY OF SURABAYA WITH CAUSAL LOOP DIAGRAM (CLD)”, Tibuana, vol. 1, no. 1, pp. 24–33, Aug. 2018, doi: 10.36456/tibuana.1.1.1587.24-33.