Historical climate change impacts on the water balance and storage capacity of agricultural reservoirs in small ungauged watersheds

Ahmad, Mirza Junaid; Cho, Gun-ho; Choi, Kyung Sook

doi:10.1016/j.ejrh.2022.101114

Cited by 8 publications

(3 citation statements)

References 58 publications

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“…Lakes with an average depth exceeding 15m exhibit a one-month lag between net radiation and evaporation flux [ 55 ], causing the model to overestimate evaporation in summer due to increased net radiation and, conversely, to underestimate it during autumn. The assessment of the simplified Penman equation [ 44 ] demonstrates that the model performs accurately, not only for Shortandy Lake but also for other semi-arid lakes [ 56 , 57 ].…”

Section: Resultsmentioning

confidence: 99%

Unravelling long-term impact of water abstraction and climate change on endorheic lakes: A case study of Shortandy Lake in Central Asia

Baigaliyeva,

Mount,

Gosling

et al. 2024

PLoS ONE

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Endorheic lakes, lacking river outflows, are highly sensitive to environmental changes and human interventions. Central Asia (CA) has over 6000 lakes that have experienced substantial water level variability in the past century, yet causes of recent changes in many lakes remain unexplored. Modelling hydrological processes for CA lakes poses challenges in separating climatic change impacts from human management impacts due to limited data and long-term variability in hydrological regimes. This study developed a spatially lumped empirical model to investigate the effects of climate change and human water abstraction, using Shortandy Lake in Burabay National Nature Park (BNNP) as a case study. Modelling results show a significant water volume decline from 231.7x106m3 in 1986 to 172.5x106m3 in 2016, primarily driven by anthropogenic water abstraction, accounting for 92% of the total volume deficit. The highest rates of water abstraction (greater than 25% of annual outflow) occurred from 1989 to 1993, coinciding with the driest period. Since 2013, the water volume has increased due to increased precipitation and, more importantly, reduced water abstraction. Despite limited observational data with which to calibrate the model, it performs well. Our analysis underscores the challenges in modelling lakes in data-sparse regions such as CA, and highlights the importance and benefits of developing lake water balance models for the region.

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Section: Resultsmentioning

confidence: 99%

Unravelling long-term impact of water abstraction and climate change on endorheic lakes: A case study of Shortandy Lake in Central Asia

Baigaliyeva,

Mount,

Gosling

et al. 2024

PLoS ONE

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“…The results of the study in the field, many waters flow in the Leuwi Padjadjaran II Reservoir Catchment Area are covered by sedimentation deposits so that the volume of water is not maximized, and several waterways are not well channelled due to unmaintained canals. [31] Examined the impact of dam heightening on reservoir flood vulnerability changes and discovered that it enhanced adaptive capacity, which might increase the difference between inflow and outflow, reducing susceptibility. The next effort is to repair the canals.…”

Section: Water Balance Analysismentioning

confidence: 99%

F.J Mock Method For Hydrological Moel In Water Reliability Study In Leuwi Padjadjaran II Reservoir

Soerya,

Asdak,

Kendarto

et al. 2023

JAZ

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Padjadjaran University built the Leuwi Padjadjaran II Reservoir as a water harvesting facility and conservation area in the Cikeruh Sub-watershed area. This reservoir serves as a water reservoir before being channelled to other river branches and can be utilized as a water reserve collector. The water supply and the degree of water demand in the residential, non-domestic, agricultural, fishery, animal, and industrial sectors are impacted by land use changes and climate changes. This study aims to ascertain the state of the water balance in the Leuwi Padjadjaran II Catchment Area to know the deficit condition and calculate the reservoir serve. F.J. Mock Method was used to examine water availability based on climatology data. SNI 6728.1-2015, PUPR Minister Circular Letter (SE PUPR) Number 7 of 2018, and associated studies were used to analyze water demand. The findings revealed that total water demand was 133.506,09 m 3 /year with an average of 11.125,5 m 3 /month, and total water supply was 138.732,90 m 3 /year with an average of 11.561,08 m 3 /month. Throughout January-May and November-December, the water balance in the Leuwi Padjadjaran II Catchment Area was in surplus. Deficient water balance conditions occur from June-October, requiring water supply. Leuwi Padjadjaran II Catchment Area has a surplus of water, so it is sufficient to be utilized. Still, it is not evenly distributed, so there is a water shortage in several sectors, such as agriculture. To make the Leuwi Padjadjaran II Reservoir useful, conservation measures must be taken to manage the water demand.

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“…Hence, there is a clear need to set limits on peak rates of abstraction over varying periods, including peak monthly, daily, hourly, or even on an absolute rate of abstraction. There are no known studies internationally which have assessed the peak rates of irrigation abstraction, taking into account different water sources although various studies have assessed the reliability of different water supplies for agriculture from a supply-side, rather than a demand-side perspective (e.g., [6]). In the context of reviewing catchment water resources planning and allocation for agricultural irrigation, this paper describes the development of a methodology to set 'reasonable' values for peak rates of water use that take into account both the protection of the resource (environment) and the abstractor's reasonable needs.…”

Section: Introductionmentioning

confidence: 99%

Catchment-Scale Challenges for Water Resources Management: Assessing ‘Reasonable’ Peak Needs for Irrigated Agriculture in a Humid Climate

Knox,

Weatherhead

2024

Hydrology

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Rising demands and competition for water resources within all sectors are placing increasing pressure on the environment. Almost all direct abstractions in England require a licence (permit) from the regulatory authority, the Environment Agency. Assessing and setting ‘reasonable’ peak quantities of water that can be legally abstracted in an environmentally sustainable manner is central to the whole licence determination process. To protect environmental flows and other abstractors within each catchment, the regulatory authority needs to be able to set sensible limits in the licence conditions, including total seasonal volumes and peak rates of water use, particularly for abstractions from hydrologically sensitive surface water sources. This paper describes the development of a methodology to assess the ‘reasonable’ peak rates of water use for agricultural irrigation in support of catchment water resources management and planning. A daily time step water balance model was used to simulate peak monthly and daily water requirements for irrigation using long-term historical weather records for agroclimatically contrasting sites. The model-simulated outputs were then compared against observed data from selected case study farms, and against data reported in a national water abstraction database. Guidelines were then developed for setting peak monthly, daily, hourly, and absolute abstraction rates for irrigation, taking into account the environmental sensitivity of different types of water source. The application of the procedure and its relevance in other countries where catchment water resources are under intense pressure from agriculture are described.

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Historical climate change impacts on the water balance and storage capacity of agricultural reservoirs in small ungauged watersheds

Cited by 8 publications

References 58 publications

Unravelling long-term impact of water abstraction and climate change on endorheic lakes: A case study of Shortandy Lake in Central Asia

Unravelling long-term impact of water abstraction and climate change on endorheic lakes: A case study of Shortandy Lake in Central Asia

F.J Mock Method For Hydrological Moel In Water Reliability Study In Leuwi Padjadjaran II Reservoir

Catchment-Scale Challenges for Water Resources Management: Assessing ‘Reasonable’ Peak Needs for Irrigated Agriculture in a Humid Climate

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