Abstract
Rapid developments in the catchments, such as deforestation and loss of swamp areas, and in the city, such us sealing off unpaved areas have resulted in higher runoff and deteriorated the river’s conveyance capacity. Critical flooding conditions occur in the city, particularly during heavy rainfall and high tidal flow. Inundation can be characterized as river, tidal, flash and urban flood. A number of flood defense measures have been implemented, designed for return periods of 15 to 50 years, and nonstructural measures within communities who live in flood-prone areas. However, strategies consisting of both structural and nonstructural measures should be developed, upgrade current flood defense practices in Indonesia to a higher safety level, complying with a return period of 50 to 100 years. An integrated and holistic approach is necessary to find solutions for flood management problems in Indonesia. Besides, a regional Water Resources Management plan should be developed, taking into account both flooding and water scarcity issues. The study at hand describes various flood management strategies, each compiled on the basis of different starting points, such as structural measures, non-structural measures, environmental considerations, etc. The implementation of strategies, or separate measures, should focus on priorities for areas most frequently affected. On the short term, efficiency and low-cost measures should be implemented, such as flood forecasting and early warming and flood proofing. In addition, planning of mid and long-term measures should commence on short notice. In the mid-term, larger scale and sustainable measures should be implemented in order to reach a safe level with return periods of 50 to 100 years in the future. Finally, however involving stakeholders and the local communities in planning, development, and implementation of strategies and measures are of utmost importance.
Highlights
The increasing demand for land strongly influences the land-use in a catchments area
The formal institutions that are responsible for flood disaster mitigation and management in Indonesia and Pekanbaru, consist of national, provincial, city and sitespecific level
The National Coordination Committee for hazard mitigation represents the coordinating institution, which is responsible for the management of flood hazards and victim relief [14]. The members of this committee are from several ministries (Home Affairs, Social, Health, Public works, Settlement, and Regional Infrastructure, Finance and Transportation), Indonesian National Armed Forces, the Indonesian Police, and Provincial government
Summary
The increasing demand for land strongly influences the land-use in a catchments area. The flooding problems and accompanying damages might be the result of area cultivation and land-use changes without any control. It seems that increasing rainfall intensities in the upstream catchments of the river and in a city are contributing to the problem of flooding as well [4]. The rising tide is dammed up as a result of a backwater in the river [5, 6] These events cause the river to overflow and inundate the settlement areas in the floodplains and lower high lands. The capital of the province is Pekanbaru, which has a unique characteristic as influenced by two significant catchments; at the upstream and downstream. It figures out that the surface and subsurface water flows of the capital city has been influenced from two directions of upstream and downstream
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