Land use and cover changes related to green and blue infrastructure planning for water resources management based on a Budyko framework

2021 ◽  
Author(s):  
Ping Yu Fan ◽  
Kwok Pan Chun ◽  
Ana Mijic ◽  
Mou Leong Tan ◽  
Omer Yetemen ◽  
...  
Keyword(s):  
Land Use ◽  
Water Resources ◽  
Water Resources Management ◽  
Land Use Planning ◽  
Land Surface ◽  
Land Use Changes ◽  
Underlying Mechanism ◽  
Climatic Conditions ◽  
Catchment Scale ◽  
Resources Management

<p>Based on the interplays between land use and water resources, the green and blue infrastructure (GBI) is a central landscape approach for hydrological environment management. However, evidence-based principles of regional GBI planning are not well developed. The Budyko framework is widely used to explore water balance in land-use change studies. It provides a method to relate land use changes and streamflow variations based on two indices – the evaporative index (EI) and the dryness index (DI). Using the Dongjiang River Basin (DJ) as an example, we use the Geographically Weighted Principal Components Analysis (GWPCA) with adaptive kernels to classify the dominant land types based on local spatial variances. Then, we apply the Emerging Hot Spots Analysis (EHSA) to identify spatial-temporal hotspots of EI and DI for the Budyko analysis. From the EHSA, two wet years (1998 and 2016) and three dry years (2004, 2009, and 2018) are focused to investigate how land uses are related to water resources in different climatic conditions. On both catchment and hotspot scales, movements within the Budyko space are observed. These movements illustrate the associations between land use and hydrological response. These data-driven relationships can be used to explain the underlying mechanism of catchment forms (land surface property) and functions (evapotranspiration and runoff) for setting best practices for land use planning. Specifically, our results show that planners should consider to 1) reduce the area of croplands and trees, while increase the extent of grassland and water body on a catchment scale; and 2) increase rain fed croplands, broadleaved evergreen trees, and grasslands in the upstream catchment. Overall, this study highlights the scale considerations in land use planning, and land use strategies are developed based on reanalysis data and remote sensing products for catchment water resources management.</p><p></p><p></p>

scholarly journals Projection of land use to 2030 and its impacts on water availability in a brazilian sub-basin: A LCM and SWAT approach

2022 ◽  
Vol 61 (1) ◽  
pp. 66-87
Author(s):  
Adriana Paulo de Sousa Oliveira ◽  
Rafaela Ribeiro Gracelli ◽  
Arthur Amaral e Silva ◽  
Vitor Juste dos Santos ◽  
Jackeline De Siqueira Castro ◽  
...  
Keyword(s):  
Land Use ◽  
Water Resources ◽  
Water Resources Management ◽  
Water Availability ◽  
Assessment Tool ◽  
Swat Model ◽  
Water Security ◽  
Climatic Conditions ◽  
Southeastern Brazil ◽  
Resources Management

Changes in land use and land cover (LULC) can result in significant changes in a hydrographic ba- sin flow regime. Future projections about LULC and its interference with water availability help to identify extreme events in advance and help propose appropriate management measures. Thus, this study aimed to make the LULC projection for the year 2030 for the Alto Rio Grande (ARG) sub- basin, located in Southeastern Brazil. This region was chosen because of its intense water resources use and for having recently faced water scarcity as result of prolonged droughts and inadequate water resources management. To identify the LULC trend for the year 2030, the Land Change Modeler (LCM) was used, the map obtained was inserted in the Soil and Water Assessment Tool (SWAT) model previously calibrated and validated for the region’ environmental and climatic conditions. The ARG sub-basin was affected by heavy rains in 2011, which resulted in changes in the landscape due to landslides. This particularity of the region contributed to the projection of LULC for the year 2030 to present an increase in forest and pastures to the agricultural areas detriment. When evaluating the impacts of these changes in water availability, it was observed that the SWAT model presented, for the same rainfall conditions, a reduction in peak streamflows of up to 59% and a reduction in the average monthly flow of up to 63% in 2030 in relation to the LULC observed in 2017. Thus, this study provides an important contribution by identifying a considerable reduction in water availability. These results will help to formulate strategies for water resources management and the adoption of measures to promote water security in the region.

scholarly journals Experience in Improvement of the Water Sector Institutional Structures

2018 ◽  
Author(s):  
Keyword(s):  
Water Resources ◽  
Central Asia ◽  
Water Resources Management ◽  
Integrated Management ◽  
Climatic Conditions ◽  
Water Sector ◽  
Resources Management ◽  
Water Users ◽  
Institutional Structures ◽  
Water Legislation

Experience of the Central Asia countries in the sphere of reorming of institutional structures responsible for water resources management has been investigated. The outcomes of the works aimed at studying of the results of the integrated management principles application in order to improve structures and methods of water resources management are presented. These outputs enable to reveal special features of the approaches to the management problems solution in the conditions of available water resources abundance and lack in countries with different economic and natural/climatic conditions. The experience was summed up and the typical trends in the water sector management improvement accumulated in the Central Asia countries, as well as the date from other countries with the similar problems including NICs with centralized administrative systems, regions with the many-century traditions of irrigation farming, as well as the countries of transitional economy were revealed. Studying of many countries’ experience concerning adiption of the water resources integrated management allows us to state that there is no sungle ideal or universal model of transition from spatial/territorial management to basin management, no model which can be applied to any country. Analysis of the water resources management systems and institutions enables to formulate the main conditions for effective application of water resources integrated management principles. The paper notes that in spite of substantial progess in water resources management attained in the Central Asia countries many problems including practical application of water legislation, taking into account interest of all sectors of national economy, better coordination between ministeries and agencies involved in water resources management, participation of all stakeholders in taking decisions concerning water supply projects, distribution of juridical and financial obligations between water users and government, and insufficient coordination and agreement in actions at international, national andregional levels stay unsolved.

scholarly journals Drought Risk under Climate and Land Use Changes: Implication to Water Resource Availability at Catchment Scale

Water ◽  
2019 ◽  
Vol 11 (9) ◽  
pp. 1790 ◽  
Author(s):  
Muhammad Afzal ◽  
Ragab Ragab
Keyword(s):  
Climate Change ◽  
Land Use ◽  
Water Resources ◽  
Groundwater Recharge ◽  
Land Use Changes ◽  
Future Climate Change ◽  
Emission Scenarios ◽  
Catchment Scale ◽  
High Emission ◽  
The Impact

Although the climate change projections are produced by global models, studying the impact of climatic change on water resources is commonly investigated at catchment scale where the measurements are taken, and water management decisions are made. For this study, the Frome catchment in the UK was investigated as an example of midland England. The DiCaSM model was applied using the UKCP09 future climate change scenarios. The climate projections indicate that the greatest decrease in groundwater recharge and streamflow was projected under high emission scenarios in the 2080s. Under the medium and high emission scenarios, model results revealed that the frequency and severity of drought events would be the highest. The drought indices, the Reconnaissance Drought Index, RDI, Soil Moisture Deficit, SMD and Wetness Index, WI, predicted an increase in the severity of future drought events under the high emission scenarios. Increasing broadleaf forest area would decrease streamflow and groundwater recharge. Urban expansion could increase surface runoff. Decreasing winter barley and grass and increasing oil seed rape, would increase SMD and slightly decrease river flow. Findings of this study are helpful in the planning and management of the water resources considering the impact of climate and land use changes on variability in the availability of surface and groundwater resources.

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