indicators

Question 1

vorosmarty et al (2000) indicator

Answer 1

RWD = water demand/wateravailability

Question 2

(dis)advantage of vorosmarty (2000)

Answer 2

1. formula is simple and widely applicable
2. limited subjectivity in determining water use
3. does not take water quality into account
4. does not consider weights or scores in the indicator so it is less subjective

Question 3

Vorosmarty 2010 (dis)advantages

Answer 3

1. takes into account various themes (cropland, livestock;fisheries;pollution;water resources development)
2. spatially very accurate on a global level
3. includes water quality
4. many drivers increase a measurement risk
5. lack of data can restrict the indicator potential
6. global model so not regionally applicable

Question 4

falkenmark indicator (dis)advantages

Answer 4

water availability relative to the population
1. easy to use
2. limited data requirements

1. does not contain water quality
2. water availability is not equally distributed across the world. not everyone has the same acces to water resources. so population is not a good indicator to use to assess water stress

Question 5

water-use-to-availability-ratio (dis)advantages

Answer 5

1. focuses on the amount of water that is used in relation to the available water. this is an adequate indicator of water stress
2. can be used to calculate sector specific water use
3. does not take water quality into account
4. data is not always available

Question 6

w. footprint to availability ratio

Answer 6

1. good indicator of how much water a produced good uses
2. includes the water source (sectoral water use?)
3. does not include water quality
4. complex, difficult to calculate and needs a lot of data

Question 7

wq in water scarcity

Answer 7

calculates the ratio of sectoral water withdrawals of adequate quality relative to the water availability.
1. includes water quality
2. gives water stress indicator per sector
3. includes the environmental flow requirements

1. rather complex, lots of data needed
2. only works for pollutants that can be diluted

Question 8

NO FISH indicator aim

Answer 8

aim is to assess seasonal water stress experienced by the american paddlefish living in the lower mississipi river due to changes in total nitrogen and river discharges over seasons, causing variations in the dissolved oxygen levels. indicator is derived from the falkenmark indicator but we added the required amount of water to dilute the total nitrogen from van Vliet et al (2017)

Question 9

NO FISH equation

Answer 9

water stress(for paddlefish, in sub basin level, per season) = (seasonal water availability in subbasin LMR) - (required amount of water that dilutes the total N in each season in the sub-basin level(cricital nutrient load for paddlefish)) / population of paddlefish over seasons in LMR

so WS = (WA - dn)/Pop
all include n, s, j
n = natural sector this is the paddlefish
s = season
j = sub-basin level of LMR

Question 10

NO-FISH indicator (dis)advantages

Answer 10

1. we included water quality
2. can be adapted to any fish type with minor adjustments
3. does not distinguish between pollutant sources
4. not validated