to an electrical grid system can use economical induction generators to further reduce installation cost and simplify control and operation. Small "run of the river" projects do not have a conventional dam with a reservoir, only a weir to form a headpond for diversion of inlet water to the turbine. Unused water simply flows over the weir and the headpond may only be capable of a single day's storage, not enough for dry summers or frozen winters when generation may come to a halt. A preferred scenario is to have the inlet in an existing lake. Modular “micro hydrokinetic” systems have been developed for irrigation canals. "Irrigation districts across the U.S. have installed power plants at diversion points and in-canal drops, which are traditionally used for flow measurement, to stabilize upstream heads and to dissipate energy where there is significant elevation change throughout the canal system." Countries like India and China have policies in favor of small hydro, and the regulatory process allows for building dams and reservoirs. In North America and Europe the regulatory process is too long and expensive to consider having a dam and a reservoir for a small project. Small hydro projects usually have faster environmental and licensing procedures, and since the equipment is usually in serial production, standardized and simplified, and the civil works construction is also reduced, the projects may be developed very rapidly. The physically smaller size of equipment makes it easier to transport to remote areas without good road or rail access. One measure of decreased environmental impact with lakes and reservoirs depends on the balance between stream flow and power production. Reducing water diversions helps the river's ecosystem, but reduces the hydro system's return on Investment (ROI). The hydro system design must strike a balance to maintain both the health of the stream and the economics. Sample list of small installations worldwide Africa Zengamina, a 700 kW plant in Kalene Hill, Mwinilunga District in northwestern Zambia. 2008 Asia Meenvallam Small Hydroelectric Project, Palakkad district, Kerala, India. Bario Asal & Arur Layun Micro-Hydro Community Project, Kelabit Highlands, Sarawak, Malaysia. 2009 Ambangal Mini Hydro Electric Power Plant, Kiangan, Ifugao, Philippines (2010) Asiga River Mini Hydro Electric Power Plant, Santiago, Agusan del Norte, Philippines (2019) Balongbong Mini Hydro Electric Power Plant, Bato, Catanduanes, Philippines (1983) Cantingas Mini Hydro Electric Power Plant, San Fernando, Romblon, Philippines (2009) Likud Mini Hydro Electric Power Plant, Asipulo and