6.1 Integrated Water Management for Quality and Quantity
143
In 2009 the National Water Plan was initiated and aimed at “The Netherlands, a safe
and livable delta, now and in the future” (RWS, 2009, p. 4). The National Water Plan
contained a 6 year program to achieve this main goal. In December 2014 the new National
Water Plan for the period 2016–2021 was drafted containing the achievements so far and
the ongoing measures. Furthermore, it contained the responsibilities in the water sector
based on the Administrative Agreement on Water (2011) and the envisaged adoption of
new standards for safety. As laid down in the draft (MinInfraM and MinEZ, 2014b, p. 10)
the [Dutch] Cabinet aims to achieve the following goals:
• The flood risk management policy offers everyone living behind a dike in The Netherlands
a tolerable risk level of at least 1 in a 100,000 per year. This means that the probability of
dying as a result of a flood for any individual should be no greater than 0.001% per year.
• Moreover, additional protection is offered in areas where there may be:
– potentially large groups of victims;
– and/or major economic damage;
– and/or serious damage as a result of the failure of vital and vulnerable infrastructure of
national importance.
Consequently, another change took place: The new standards are no longer valid for dikerings they are valid for dike-sections
6 – see also Eijgenraam (2006, 2007). According to
the new classification it was divided into six categories ranging from 1/300 per year to
1/100,000 per year. The Netherlands aimed at the conduction of “anticipatory assessment
and ensure a robust design” (MinInfraM and MinEZ, 2014b, p. 11) of protection against
flooding.
The basic idea is to introduce the Multi-layer Safety (MLS) concept which comprises
three layers:
Layer 1 – Preventive measures to limit the probability of a flood.
Layer 2 – Spatial organization of an area to limit the consequences of a flood and, in
specific cases, to contribute directly to the desired level of safety.
Layer 3 – Disaster management to limit the consequences of a flood in terms of
casualties.
The MLS is aiming at acknowledging the full range of (coastal) flood risk management
from prevention to recovery based on the risk definition provided by the formula (6.1)
on p. 130 (see also Fig. 6.7). The recently published report for the new Delta program
6 In the Floris project the following definition was applied (see Vergouwe, 2015): A levee system
consists of all kind of flood defenses. In the Floris project each system was first divided into homogeneous stretches of some 250 to 1500 m. Hydraulic structures like locks and pumping stations were
treated as separate parts.
143
In 2009 the National Water Plan was initiated and aimed at “The Netherlands, a safe
and livable delta, now and in the future” (RWS, 2009, p. 4). The National Water Plan
contained a 6 year program to achieve this main goal. In December 2014 the new National
Water Plan for the period 2016–2021 was drafted containing the achievements so far and
the ongoing measures. Furthermore, it contained the responsibilities in the water sector
based on the Administrative Agreement on Water (2011) and the envisaged adoption of
new standards for safety. As laid down in the draft (MinInfraM and MinEZ, 2014b, p. 10)
the [Dutch] Cabinet aims to achieve the following goals:
• The flood risk management policy offers everyone living behind a dike in The Netherlands
a tolerable risk level of at least 1 in a 100,000 per year. This means that the probability of
dying as a result of a flood for any individual should be no greater than 0.001% per year.
• Moreover, additional protection is offered in areas where there may be:
– potentially large groups of victims;
– and/or major economic damage;
– and/or serious damage as a result of the failure of vital and vulnerable infrastructure of
national importance.
Consequently, another change took place: The new standards are no longer valid for dikerings they are valid for dike-sections
6 – see also Eijgenraam (2006, 2007). According to
the new classification it was divided into six categories ranging from 1/300 per year to
1/100,000 per year. The Netherlands aimed at the conduction of “anticipatory assessment
and ensure a robust design” (MinInfraM and MinEZ, 2014b, p. 11) of protection against
flooding.
The basic idea is to introduce the Multi-layer Safety (MLS) concept which comprises
three layers:
Layer 1 – Preventive measures to limit the probability of a flood.
Layer 2 – Spatial organization of an area to limit the consequences of a flood and, in
specific cases, to contribute directly to the desired level of safety.
Layer 3 – Disaster management to limit the consequences of a flood in terms of
casualties.
The MLS is aiming at acknowledging the full range of (coastal) flood risk management
from prevention to recovery based on the risk definition provided by the formula (6.1)
on p. 130 (see also Fig. 6.7). The recently published report for the new Delta program
6 In the Floris project the following definition was applied (see Vergouwe, 2015): A levee system
consists of all kind of flood defenses. In the Floris project each system was first divided into homogeneous stretches of some 250 to 1500 m. Hydraulic structures like locks and pumping stations were
treated as separate parts.