Assessing the groundwater deficit for agriculture requirements under precipitation change while achieving food and water security in the North China Plain

Ecological Indicators, Journal Year: 2023, Volume and Issue: 155, P. 111038 - 111038

Published: Oct. 3, 2023

Groundwater resources are closely related to climate change. Evaluating the groundwater deficit and its variation characteristics under change is necessary understand risk associated with enhanced recovery solutions provide supporting information for choosing best technology risk-reducing measures implement. In this study, by using CROPWAT model copula theory, (1) we developed a index (Gsci) agricultural requirements that assesses imposed precipitation changes on North China Plain (NCP), four grades of Gsci were high deficit, moderate low no deficit. (2) We estimated NCP period 1971–2020 applying climatic, soil, crop phenological, hydrogeology data index. (3) The occurrence probability each grade was evaluated. years abundant precipitation, probabilities no-deficit events 1, 0, 0.36, 0.56, 0 Yanshan Plain, Taihang-Hebei Taihang-Henan Central-Hebei Central-Shandong Central-Henan Coastal respectively. (4) effective threshold calculated, thresholds 495 mm, 595 525 400 455 555 mm Our findings useful assessing impacts further basis design resource management strategies respect change, especially in water‐limited arid regions.

Language: Английский

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Optimization of a nitrogen fertilizer application scheme for spring maize in full-film double-ridge furrow in Longzhong, China

Agricultural Water Management, Journal Year: 2023, Volume and Issue: 290, P. 108580 - 108580

Published: Nov. 7, 2023

Full-film double-ridge furrow sowing technology (FDRFST) and nitrogen (N) management are crucial for sustainable agricultural development. To investigate the N fertilizer application scheme spring maize with high yield, precipitation water productivity (PWP), use efficiency (NUE) under FDRFST, a two-year field experiment was carried out in rainfed area of Longzhong (LZ). Treatments included two types fertilization (common urea [U] controlled release [CU]), three rates (180, 225, 270 kg hm−2), conditions no plastic film mulching. The results showed that temperature-increase effect PM on soil between 2021 2022 concentrated 0–90 days, average values 5 cm temperature increasing by 4.15 3.58 ºC, respectively. However, rate had negligible effects temperature. Plastic mulching (PM) required compensation, particularly during sowing–emergence stage, 1.68 compensation coefficient. Based simulation modified DNDC model, recommended CU (180 hm−2) LZ increased PWP, NUE 15.8%, 16.0%, 36.4% from 1981 to 2020, respectively, compared U treatments. Our provide theoretical basis production offer critical insights improving model conditions.

Language: Английский

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Assessment and forecast of the water-related nature’s contributions to people on the Loess Plateau from a spatial flow perspective

Landscape Ecology, Journal Year: 2024, Volume and Issue: 39(9)

Published: Aug. 16, 2024

Integrating the spatial flow perspective, temporal trade-off and future tendency perspective enables a comprehensive assessment of nature's contributions to people (NCPs). However, assessments that integrate these perspectives combine them with regional ecological restoration policy remain limited. Based on considering two dimensions people's needs, we assessed forecasted water-related NCPs, including water yield (NCP6), purification (NCP7), soil conservation (NCP8), from Loess Plateau downstream regions Yellow River in China. To forecast tendencies NCPs their trade-offs, simulate land use changes based rapid landscape slow under five shared socioeconomic pathways (SSPs) 2020 2100. The results showed distributions values three differ greatly corresponding contributions. NCP will decrease all scenarios, while be stable most scenarios except SSP3. faster R2 compared R1, highest rate observed at 2.11%. Conversely, experienced R1 than R2, rates 8.61% 14.30% respectively. have more positive impact NCP, negative other restoration. This provides benefits dual indicating importance integrating both when making policy.

Language: Английский

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Driving effects of ecosystems and social systems on water supply and demand in semiarid areas

Journal of Cleaner Production, Journal Year: 2024, Volume and Issue: 482, P. 144222 - 144222

Published: Nov. 14, 2024

Language: Английский

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Impact of Land Use Change on Water-Related Ecosystem Services under Multiple Ecological Restoration Scenarios in the Ganjiang River Basin, China

Forests, Journal Year: 2024, Volume and Issue: 15(7), P. 1225 - 1225

Published: July 15, 2024

Ecological restoration programs (ERPs) can lead to dramatic land use change, thereby affecting ecosystem services and their interaction. Determining the optimal ERPs is a crucial issue for ecological in ecologically fragile regions. This study analyzed impacts of change on four water-related (WESs), namely water yield, soil retention, purification, food production Ganjiang River basin, China during past two decades. Then, trade-off synergy between WESs were detected based correlation analysis. Finally, quantify effect WESs, we comprehensively considered types intensity designed categories scenarios: returning farmland forest (RFF) scenarios; planting (PF) riparian forestland buffer (RFB) grassland (RGB) scenarios. Each category contains five scenarios different intensities. The results showed that increased while purification decreased from 2000 2020. deterioration quality was mainly due transitions built-up land. Trade-offs only occurred regulating provisioning services. Among all scenarios, RFF significantly improve retention at same time, although will decrease. Considering security, with slope greater than 10 degrees scenario area. highlighted both type should be restoration. contribute basin other subtropical mountainous

Language: Английский

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Simulating the Impact of Urban Expansion on Ecological Security Pattern from a Multi-Scenario Perspective: A Case Changsha–Zhuzhou–Xiangtan Urban Agglomeration, China

Sustainability, Journal Year: 2024, Volume and Issue: 16(21), P. 9382 - 9382

Published: Oct. 29, 2024

Rapid urbanization has further expanded the scale of construction land in urban agglomerations. The encroachment on ecological led to severe problems and threatened stability security Analyzing characteristics future multi-scenario expansion its impacts patterns (ESP) can provide guidance for formulating ecologically sustainable management control Policies. Our study focuses Changsha-Zhuzhou-Xiangtan (CZX) agglomeration as area establishes an ESP. Additionally, a cellular automata (CA) was used simulate under three scenarios (i.e., natural development scenario, conservation scenario). subsequent analysis evaluates their impact simulation results indicate that from 2020 2030, CZX will undergo rapid scenario characterized by outward growth surrounding existing land. In is primarily concentrated northwest south directions land, proportion increased 2.78%; it southeast direction 3.24%. Ecological conflicts aforementioned arise southwestern region Changsha County, well southern areas Kaifu District Furong District. Conversely, rate significantly decreased, environmental preservation upheld at highest level, only 0.04%. Based results, we present targeted recommendations planning management, protection, restoration, monitoring, These suggestions effective improving ESP agglomerations promoting high-quality Chinese

Language: Английский

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Examining the Impacts of Recent Water Availability on the Future Food Security Risks in Pakistan Using Machine Learning Approaches

Water, Journal Year: 2024, Volume and Issue: 17(1), P. 55 - 55

Published: Dec. 28, 2024

Food and water security are critical challenges in Pakistan, exacerbated by rapid population growth, climate variability, limited resources. This study explores the application of machine learning techniques to address these issues. We specifically examine dimensions food employing data-driven methods enhance crop yield predictions, production forecasting, resource management. Using secondary data, we refine models, such as random forest linear regression, analyze availability, yield, production. These models aim optimize distribution, improve irrigation efficiency, minimize waste. propose developing AI-based predictions crises proactively. Our findings indicate that insecurity persists worsened uneven distribution. Given country’s high dependence on for production, impact growth demand. recommend a comprehensive strategy includes infrastructure development, improved use efficiency agriculture, policy adjustments balance imports exports.

Language: Английский

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Risk-based decision-making systems in water and food security of global drylands

Water Science & Technology Water Supply, Journal Year: 2023, Volume and Issue: 23(5), P. 2224 - 2232

Published: April 10, 2023

Abstract This study introduces the foundational principles behind water footprint in and food security for evaluating managerial strategies of agricultural management arid areas. The role green, grey, blue white footprints yield production has been critically investigated to analyze climate economic risks. Therefore, a nonlinear hydro-economic framework, which integrates soil content, economics used semi-arid regions China. Non-dimensional form net benefit per drop was formulated uncertainty parameters. Root zone moisture simulated estimate crop yield, transpiration, evaporation, required irrigation increase quality. Five plants potato, onion, tomato, eggplant carrot were selected due similarity plant growth season market criteria. results showed that average effective rainfall contributed less than 15% production. impact risk fluctuations achieving expected profit more water.

Language: Английский

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Response of net water productivity to climate and edaphic moisture in wheat-maize rotation system

Soil and Tillage Research, Journal Year: 2023, Volume and Issue: 237, P. 105965 - 105965

Published: Dec. 6, 2023

Language: Английский

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