The dam reservoir of Bin El Ouidane (azilal, morocco) face to climate change

Ahbari, Abdellatif; Stour, Laila; Agoumi, Ali

doi:10.14299/ijser.2017.05.013

“…1 Geographical map locating the basin of BEO, the dams, and the irrigated perimeters The BEO-AEO reservoir complex is located at the outlet of an upstream basin of 6500 km 2 . The analysis of the past hydro-climatologic variables evolution within the basin of BEO (Ahbari et al 2017) shows an augmentation trend of the annual temperature (+0,4°C in 1989-2013 and of evaporation from the reservoir (+470 mm in 1976-2006), as stagnation of annual rainfall (around 400 mm during 1976-2014) and a substantial drop of the annual water supply to the reservoir by almost 50% after 1976 (from 1350 Mm 3 during 1939-1976to 750 Mm 3 during 1976-2014.…”

Section: Overview Of the Adopted Framework Of Analysismentioning

confidence: 99%

Impacts of Climate Change on the Hydro-Climatology and Performances of Bin El Ouidane Reservoir: Morocco, Africa

Ahbari¹,

Stour²,

Agoumi³

2020

African Handbook of Climate Change Adaptation

1

0

View full text Add to dashboard Cite

In arid and humid contexts, dams’ reservoirs play a crucial role in water regulation and flood control. Under the projected climate change (CC) effects, even a preoptimized management approach (MA) of a reservoir needs to be assessed in this projected climate. This chapter aims to assess the impacts of CC on the Hydroclimatic (HC) variables of the basin upstream the reservoir of Bin El Ouidane (Morocco), and the effects on the performances of its preoptimized MA. The applied Top-Down assessment procedure included CORDEX climate projections, hydrological, siltation, evaporation, and management models. Concerning the HC variables, the results obtained concord with those reported in the literature in terms of trend, but not always in terms of intensity of change. On the other hand, the projections expected a decrease in the performances of the reservoir, except for criterion allocations’ standard deviation, calibrated during the optimization. Also, interesting conclusions have been found like: the change in precipitation dominant form, the accentuation of the pluvial hydrological regime, the advanced snow melting due to the temperature increase. This chapter presents a typical case study on how to use climate projections for reservoir MA adaptation, without being highly and negatively influenced by the climate model uncertainties.

show abstract

“…8 demonstrates that in parallel with the reduction of its volume drained, the season of "high supply" will prolong temporally compared to the reference period of 1986-2015. Moreover, the change of hydrologic regime from pluvio-nival to pluvial, mentioned in Ahbari et al (2017), will be accentuated in both RCPs. Thus, the hydrologic peak is located in March, after being culminating in April during the period 1939-1976 (Ahbari et al 2017).…”

Section: Intra-annual Evolution Of the Variablesmentioning

confidence: 95%

“…Moreover, the change of hydrologic regime from pluvio-nival to pluvial, mentioned in Ahbari et al (2017), will be accentuated in both RCPs. Thus, the hydrologic peak is located in March, after being culminating in April during the period 1939-1976 (Ahbari et al 2017). The accentuation of the pluvial regime can be justified when observing the RCPs curves, which present a peak roughly in the form of a plateau, especially for the RCP 2.6, where the plateau covers the months January-February-March.…”

Section: Intra-annual Evolution Of the Variablesmentioning

confidence: 95%

“…The analysis of the past hydro-climatologic variables evolution within the Fig. 1 Geographical map locating the basin of BEO, the dams, and the irrigated perimeters basin of BEO (Ahbari et al 2017) shows an augmentation trend of the annual temperature (+0,4°C in 1989-2013 and of evaporation from the reservoir (+470 mm in 1976-2006), as stagnation of annual rainfall (around 400 mm during 1976-2014) and a substantial drop of the annual water supply to the reservoir by almost 50% after 1976 (from 1350 Mm 3 during 1939-1976to 750 Mm 3 during 1976-2014.…”

Section: Overview Of the Adopted Framework Of Analysismentioning

confidence: 99%

See 1 more Smart Citation

Impacts of Climate Change on the Hydro-Climatology and Performances of Bin El Ouidane Reservoir: Morocco, Africa

Ahbari

¹

,

Stour

²

,

Agoumi

³

2021

African Handbook of Climate Change Adaptation

1

0

View full text Add to dashboard Cite

In arid and humid contexts, dams’ reservoirs play a crucial role in water regulation and flood control. Under the projected climate change (CC) effects, even a preoptimized management approach (MA) of a reservoir needs to be assessed in this projected climate. This chapter aims to assess the impacts of CC on the Hydroclimatic (HC) variables of the basin upstream the reservoir of Bin El Ouidane (Morocco), and the effects on the performances of its preoptimized MA. The applied Top-Down assessment procedure included CORDEX climate projections, hydrological, siltation, evaporation, and management models. Concerning the HC variables, the results obtained concord with those reported in the literature in terms of trend, but not always in terms of intensity of change. On the other hand, the projections expected a decrease in the performances of the reservoir, except for criterion allocations’ standard deviation, calibrated during the optimization. Also, interesting conclusions have been found like: the change in precipitation dominant form, the accentuation of the pluvial hydrological regime, the advanced snow melting due to the temperature increase. This chapter presents a typical case study on how to use climate projections for reservoir MA adaptation, without being highly and negatively influenced by the climate model uncertainties.

show abstract