Rs 6500 crores spent in last 19 years and Yamuna is dirtier than before; getting worse!!

In the last 19 years, Rs 6500 crores have been spent to clean the River Yamuna but it is dirtier than ever.  What one wonders is what happened to that money?  Who pocketed it while the main northern river has gotten worse and worse?? Six years back, Delhi Jal Board