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Subject: search.filters.subject.Flood damage prevention

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    The quantification of indirect benefits from flood protection in the lower Waikato : a thesis presented in partial fulfilment of the requirements for the degree of Masters of Applied Economics in Natural Resources at Massey University
    (Massey University, 2002) Quazi, Mohammad Asif
    Flood protection schemes provide a wide range of benefits to people living in the immediate floodplain area and to those living further away from the floodplain area. Since such schemes are public goods, they are often provided and managed by the government or local bodies. According to the Local Government Act (No.3) of 1996, the community based funding of such works are to be allocated purely according to benefit received. In other words, those who benefit from the works are required to contribute towards the costs of the works, in proportion to the benefits they received. Hence the need for the quantification of benefits. The Rating Powers Act of 1988 requires the rating of flood protection schemes to take into account direct and indirect beneficiaries. In this research the aim was to quantify the indirect benefits from flood protection in the Lower Waikato, using the non-market valuation technique of Contingent Valuation. In particular the study focused on the indirect beneficiaries of the Lower Waikato Waipa Flood Control Scheme (LWWCS). A total of 800 households in the indirect benefit area of the LWWCS were sent a mail questionnaire to elicit their willingness to pay for indirect flood protection. A return rate of 31 percent was obtained. The results obtained indicated that 56.8 percent of the respondents perceived to benefit from the LWWCS, and 65.3 percent respondents believed that flood protection was worth paying for. The dollar value allocated to indirect flood protection in the Lower Waikato was estimated at $21.40 per year per household.
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    Assessing the impacts of extreme floods on agriculture in Vietnam : Quang Nam case study : a dissertation presented in partial fulfilment of the requirements for the degree of Doctor of Philosophy in Environmental Management at Massey University, Manawatu, New Zealand
    (Massey University, 2014) Châu, Vũ Ngọc
    Vietnam is situated within the tropical monsoon and typhoon zone of South-East Asia and is susceptible to extreme flood events. Since the most productive agricultural land is concentrated along the low-lying river systems, losses to agriculture resulting from extreme flooding can be significant. More than 70% of the country's population live in rural areas, many in flood prone zones, and depend upon subsistence agriculture. However, to date, there have only been a limited number of studies addressing the impact of extreme flood events on agriculture in Vietnam. Using the Quang Nam province of central Vietnam as a case study, geographic information systems and digital elevation modeling are used to create geospatial inundation maps of flooded agricultural land. The mapped areas are populated with agricultural land use data and the direct costs of agricultural flood damage are calculated. Additionally, the institutional and legislative framework of Vietnam is assessed to determine whether there may be ways of streamlining systems and institutions to improve responses to extreme flooding events. This study shows that 1:10, 1:20 and 1:100-year flood events result in inundation levels of 27%, 31% and 33% of arable land respectively. The direct crop damage incurred in the inundated regions, expressed as a percentage of total value, are 12%, 56% and 62% respectively. The study also offers recommendations to improve flood management strategies.