@book{298,
	author = {Mabbin, Mary Joy B. },
	title = {Rooftop rainwater harvesting system for domestic and irrigation purposes/},
	publisher = {Nueva Vizcaya State University,},
	year = {2022.},
	address = {Bayombong:},
	note = {The climate of the Philippines is tropical and maritime characterized by relatively high temperature, high humidity, and abundant rainfall. Rainfall is the most important climatic element in the Philippines and its distribution is varied through regions depending on the direction of the moisture-bearing winds and the location of the mountain systems The mean annual rainfall of the Philippines varies from 965 to 4,064 mm. Using temperature and rainfall as bases, the climate of the country can be divided into two major seasons: the rainy season, from June to November, and the dry season, from December to May. The dry season may be subdivided further into (a) cool dry season, from December to February, and (b) hot dry season, from March to May (PAGASA DOST, 2021). The Philippines is also a country richly endowed with natural resources, including abundant surface and groundwater resources. Its total internal water resource is estimated at 130. km/year. However, despite the vastness of this potential supply, the country has a low freshwater availability per capita and experiences water-related problems (Lapong & Fujihara, 2008). As reported by Icamina, (2017) the country, like all other Asian developing countries, has regions and times of year in which water for specific uses is scarce.

Current projections of climate up to 2050 suggest the Philippines will become warmer, with increasing temperature and decreasing rainfall during the dry season and more extreme minfall events during the wet season. This will undoubtedly exacerbate both water availability during periods of drought and the magnitude of flood events during periods of heavy rainfall. In addition to water stresses from a changing climate, the population is expected to increase by around 50 percent up to 2050, with the urban population set to double over the same period. This will further exacerbate pressures on future water resources (British Geological Survey, 2021) According to Dikitanan et al. (2017), the development and implementation of strategies and interventions to respond to and build resilience to water scarcity, and climate variability must be done at all levels, especially at the basic unit. One of the most notable approaches in building resilience on the farm level is the adoption of on-farm water storage structures such as rainwater harvesting systems.

Rainwater harvesting, in its broadest sense, is a technology used for collecting and storing rainwater for human use it is a good option in areas where good quality fresh surface water or groundwater is lacking. The application of appropriate rainwater harvesting technology is important for the utilization of rainwater as a water resource (Jhakar, et al, 2015) Also, within the context of scarce water resources for agriculture, rainwater harvesting constitutes a promising alternative that has been studied by different disciplines in recent years (Velasco Muñoz, et al., 2019). As stated by United Nations Environment Programmed (UNEP) International Environmental Technology Centre (2002) the collection process in rainwater harvesting involves various techniques such as the collection of water from rooftops and the land surface, as well as within watercourses. These techniques are widely used in Asia both for meeting drinking water supply needs and for irrigation purposes.


}
}