UNAIR NEWS – High rainfall and rain intensity in the beginning of the year often cause floods in some regions in Indonesia, including Surabaya. The main streets, housing complexes and other public space were inundated. The government, private parties and communities are looking for the best solution to deal with these annual floods.
Nita Citrasari, S.Si., M.T., an environmental expert from Faculty of Science and Technology (FST), Universitas Airlangga, said that there are three factors which cause floods. First, constriction of drainage makes the water overflowed to streets and housing complexes. Second, the limited catchment area. Third, people’s behavior who like throwing out garbage in sewage system.
“Other than the mistakes on city planning and development which does not take River Basin Area (DAS) into account, people’s behavior also causes floods. We can still find people throwing out garbage in rivers. While the rivers are parts of River Basin Area (DAS),” said the lecturer of Environmental Technological Science FST UNAIR.
Urban planning becomes the public attention when the floods come. Nita viewed that DAS and catchment area planning have not been integrated well. If both of them are also taken into account on urban planning, flood cases can be reduced.
In short term, one way to reduce floods is by cleaning DAS from garbage piles and other clogging objects. “In the end, we have to let the water flows, that it will not inundate the streets such as what implemented in Holland, “ said Nita.
The lecturing staff of Department of Biology FST UNAIR explained that heavy rainfall should bring benefits. Excessive rainfall could be absorbed and contained in groundwater storages.
In drought season, these groundwater storages can be used to avoid water shortage. But, in reality, excessive rainfall is often wasted so in some regions people still experience water shortage in drought season.
“There are many technologies to overcome floods, including from environmental friendly housing material, but it has not been applied. It all depends on the commitment of the government and the people’s support,” said the lecturer who was born in 1982. (*)
Author: Okky Putri Rahayu
Editor: Defrina Sukma S