Abstract:
Since independence there is considerable advancement in the field of hydrology, specially in the design of darns, water resources development and planning, hydrological Investigations and research. Every subject on hydrology as mentioned above needs the information/data on various components of hydrological cycle such as rainfall, evaporation, wind, temperature, humidity, soil moisture, surface runoff, ground water runoff, ground water recharge,etc.,. Hydrological investigations are required to be conducted to find out information in each of these items. Information on these components excepting for rainfall was almost negligible prior to independence. The data of these components are now being observed throughout India by different organizations. Advancement in observation of various components of hydrological cycle and organizations which are responsible for its observation and maintenance have been discussed in this Chapter.
