Groundwater sustainability: a review of the interactions between science and policy

Environmental Research Letters, Год журнала: 2020, Номер 15(9), С. 093004 - 093004

Опубликована: Апрель 29, 2020

Concerns over groundwater depletion and ecosystem degradation have led to the incorporation of concept sustainability as a policy instrument in several water codes management directives worldwide. Because sustainable is embedded within integrated, co-evolving hydrological, ecological, socioeconomic systems, implementing such policies remains challenge for managers scientific community. The problem further exacerbated when participatory processes are lacking, resulting communication gap among authorities, scientists, broader This paper provides systematic review sustainability, situates this calls from hydrologic literature more integrated approaches security. We discuss definition both perspective, tracing evolution safe yield, management. focus on diversity societal values related typology aquifer performance governance factors. In addition, we systematically main components an effective evaluation policy, which multi-process modeling, uncertainty analysis, participation. conclude that implementation requires iterative (i) engages stakeholders process through collaborative modeling social learning; (ii) improved understanding coevolving scenarios between surface water-groundwater ecosystems, human activities; (iii) acknowledges addresses our knowledge preferences using multi-model analysis adaptive Although development transdisciplinary research approach, connects science, practice evaluation, still its infancy worldwide, find towards growing at much faster rate than whole.

Язык: Английский

---

Ornamental plants for the phytoremediation of heavy metals: Present knowledge and future perspectives

Environmental Research, Год журнала: 2021, Номер 195, С. 110780 - 110780

Опубликована: Фев. 2, 2021

Язык: Английский

---

Water-related ecosystem services interactions and their natural-human activity drivers: Implications for ecological protection and restoration

Journal of Environmental Management, Год журнала: 2024, Номер 352, С. 120101 - 120101

Опубликована: Янв. 15, 2024

Язык: Английский

---

Groundwater extraction may drown mega-delta: projections of extraction-induced subsidence and elevation of the Mekong delta for the 21st century

Environmental Research Communications, Год журнала: 2019, Номер 2(1), С. 011005 - 011005

Опубликована: Дек. 12, 2019

Abstract The low-lying and populous Vietnamese Mekong delta is rapidly losing elevation due to accelerating subsidence rates, primarily caused by increasing groundwater extraction. This strongly increases the delta’s vulnerability flooding, salinization, coastal erosion and, ultimately, threatens its nearly 18 million inhabitants with permanent inundation. We present projections of extraction-induced consequent loss for this century following six mitigation non-mitigation extraction scenarios using a 3D hydrogeological model coupled geotechnical module. Our results reveal long-term physically response aquifer system different pathways show potential recover. When allowed increase continuously, as it did over past decades, has drown single-handedly before end century. quantifications also disclose reduce limiting exploitation hereby future loss. However, window mitigate closing large parts lowly elevated plain may already fall below sea level in coming decades. Failure result mass displacement millions people could severely affect regional food security producing capacity collapse.

Язык: Английский

---

Long-term alterations of flow regimes of the Mekong River and adaptation strategies for the Vietnamese Mekong Delta

Journal of Hydrology Regional Studies, Год журнала: 2020, Номер 32, С. 100742 - 100742

Опубликована: Окт. 17, 2020

The Mekong basin, where climate change and anthropogenic interventions (e.g., dams, sand mining, sluice gates) have intensified in the recent decades affecting pristine flow regime salinity intrusion. This paper aims at quantifying alterations entire from 1980 to 2015 linking with controlling drivers of alterations. In this regard, various indicators, analytical methods, a semi two-dimensional hydrodynamic advection-dispersion model were used. high-dam development period (2009–2015) are more pronounced than low-dam (1993–2008), compared no-dam (1980–1992), based on most indicators analyzed. all existing dams large reservoir capacity seemed cumulatively reduced flood pulses frequency increased low-flow discharge along through operations, exceeding effect. years water levels season Vietnamese Delta (VMD) decreased, possibly because riverbed incision caused by sediment supply mining. together number gates constructed intrusion VMD which may be partly early emergency release upstream dams.

Язык: Английский

---

Evaluating the predictive power of different machine learning algorithms for groundwater salinity prediction of multi-layer coastal aquifers in the Mekong Delta, Vietnam

Ecological Indicators, Год журнала: 2021, Номер 127, С. 107790 - 107790

Опубликована: Май 17, 2021

Groundwater salinization is considered as a major environmental problem in worldwide coastal areas, influencing ecosystems and human health. However, an accurate prediction of salinity concentration groundwater remains challenge due to the complexity processes its factors. In this study, we evaluate state-of-the-art machine learning (ML) algorithms for predicting identify We conducted study multi-layer aquifers Mekong River Delta (Vietnam), using geodatabase 216 samples 14 conditioning compared predictive performances different ML techniques, i.e., Random Forest Regression (RFR), Extreme Gradient Boosting (XGBR), CatBoost (CBR), Light (LGBR) models. The model performance was assessed by root-mean-square error (RMSE), coefficient determination (R2), Akaike Information Criterion (AIC), Bayesian (BIC). results show that CBR has highest with both training (R2 = 0.999, RMSE 29.90) testing datasets 0.84, 205.96, AIC 720.60, BIC 751.04). Ten factors, including distance saline sources, depth screen well, level, vertical hydraulic conductivity, operation time, well density, extraction capacity, thickness aquitard, fault, horizontal conductivity are most important factors prediction. provide insights policymakers proposing remediation management strategies issues context excessive exploitation lowland regions. Since human-induced have significantly influenced salinization, urgent actions should be taken into consideration ensure sustainable areas Delta.

Язык: Английский

---

The worst 2020 saline water intrusion disaster of the past century in the Mekong Delta: Impacts, causes, and management implications

AMBIO, Год журнала: 2021, Номер 51(3), С. 691 - 699

Опубликована: Июнь 11, 2021

Язык: Английский

---

Surface Water Mapping and Flood Monitoring in the Mekong Delta Using Sentinel-1 SAR Time Series and Otsu Threshold

Remote Sensing, Год журнала: 2022, Номер 14(22), С. 5721 - 5721

Опубликована: Ноя. 12, 2022

The annual flood and the alteration in hydrological regimes are most vital concerns Vietnamese Mekong Delta (VMD). Although synthetic aperture radar (SAR) Sentinel-1 imagery is widely used for water management, only a few studies have data mapping surface monitoring events VMD. This study developed an algorithm to implement (i) automatic Otsu threshold on series of images extract (ii) time analyses derived maps detect extent near-real-time (NRT). Specifically, cross-polarized VH was selected after assessment different polarizations. dynamic thresholding applied identify optimal each pre-processed image separate from non-water pixels producing maps. were visually compared with Sentinel-2 Full Resolution Browse (FRB) statistically examined Multispectral Instrument (MSI) maps, which generated by applying normalized difference index (NDWI) modified (MNDWI) images. visual comparison showed strong correspondence between FRB three periods, including rice’s sowing season, period, maturation stage. A good statistical agreement suggested that performance map effective river areas (R2 = 0.97 RMSE 1.18%), while it somewhat lower paddy field 0.88 3.88%). Afterward, NRT change-detection-based Every single pixel at t respectively referred its state water/non-water flooded/non-flooded previous t−1 be classified into flooded or non-flooded pixel. enables updates step generate temporal large-scale areas. provides tool rapidly support management risk reduction future improvement current discussed.

Язык: Английский

---

Dynamics of aquaculture governance

Journal of the World Aquaculture Society, Год журнала: 2023, Номер 54(2), С. 427 - 481

Опубликована: Апрель 1, 2023

Abstract Aquaculture is a growing industry with an annual growth rate that far superior to the population rate. Most production occurs in lower‐ and middle‐income countries, therefore, they can improve efficiency modernize systems increase exports earn foreign exchange earnings for economic social development. The institutional arrangements should be part of mechanisms ensure sustainable aquaculture growth, through participation all stakeholders. Sustainability possible good dynamic governance which embraces basic principles governance, equity, accountability, efficiency, predictability. Over past decade, several countries made changes implemented regulations their action plans productivity, stakeholders profited from along value chain. For producers benefit value‐added products, complied imposed by importing international regulatory bodies, or own consumers. Standards increased, implementation certification resulted industrial structure. These standards, inflict cost on producers, stimulated improvement productivity product quality. However, during last declined 5.8% 2001 2010 4.5% 2011 2018, resulting elusive realization potential meeting development targets. There need paradigm shift encourages small‐scale engage intensive aquaculture. challenge is, move toward intensification expansion, harmonization national supply safe adequate fish consumers, while maintaining system, at same time conserving environment stability. With political will, social, economic, environmental objectives attaining Sustainable Development Goals period 2020–2030 are if governments integrate developments within expanded aquatic terrestrial food security policy framework using thinking open innovation approaches.

Язык: Английский

---

A Systematic Review of Water Governance in Asian Countries: Challenges, Frameworks, and Pathways Toward Sustainable Development Goals

Earth Systems and Environment, Год журнала: 2024, Номер 8(2), С. 181 - 205

Опубликована: Март 11, 2024

Язык: Английский

---