Remote sensing-based spatiotemporal variation and driving factor assessment of chlorophyll-a concentrations in China’s Pearl River Estuary DOI Creative Commons
Wenjie Fan,

Zhihao Xu,

Qian Dong

et al.

Frontiers in Marine Science, Journal Year: 2023, Volume and Issue: 10

Published: Aug. 10, 2023

Climate change and intensive anthropogenic activities have severely challenged the water quality of China’s Pearl River Estuary (PRE). Further investigations into long-term variation associated driving mechanisms are therefore necessary to support sustainable development PRE’s Greater Bay Area (GBA). This study used remote sensing retrieval address spatiotemporal chlorophyll- a (Chl- ) characteristics in PRE relationship between Chl -a concentrations socioeconomic/environmental indicators. Three decades Landsat satellite images measured data were collected, two-band global algorithm was retrieve Chl- concentration data. Results reveal significant variability concentrations. The space-averaged exhibited slight downward trend during past three decades, multi-year mean value 5.20 mg/L. Changes environmental protection policies recent years improved overall quality. western section had highest (i.e., 5.92 mg/L average) while eastern lowest 3.98 average). discrepancy likely caused by section’s more industrial activities, resulting higher wastewater discharge volume. Affected climatic conditions, winter evenly distributed summer significantly higher. Additionally, positively correlated with total phosphorus (TP), nitrogen (TN), ammonia (NH 3 -N), biotic oxygen demand (BOD 5 ). also external factors climate activities). Among these factors, proportion primary industries coastal cities is intended help direct improvement management urban GBA.

Language: Английский

Reveal the severe spatial and temporal patterns of abandoned cropland in China over the past 30 years DOI
Maoxin Zhang, Guangyu Li, Tingting He

et al.

The Science of The Total Environment, Journal Year: 2022, Volume and Issue: 857, P. 159591 - 159591

Published: Oct. 20, 2022

Language: Английский

Citations

77
A climate-water quality assessment framework for quantifying the contributions of climate change and human activities to water quality variations DOI
Yuan Wang, Qiang Liu, Shuai Song

et al.

Journal of Environmental Management, Journal Year: 2023, Volume and Issue: 333, P. 117441 - 117441

Published: Feb. 6, 2023

Language: Английский

Citations

42
Enhancing phosphorus source apportionment in watersheds through species-specific analysis DOI
Yuansi Hu, Mengli Chen,

Jia Pu

et al.

Water Research, Journal Year: 2024, Volume and Issue: 253, P. 121262 - 121262

Published: Feb. 7, 2024

Language: Английский

Citations

16
Applying water environment capacity to assess the non-point source pollution risks in watersheds DOI
Yuanyuan Li, Hua Wang,

Yanqing Deng

et al.

Water Research, Journal Year: 2023, Volume and Issue: 240, P. 120092 - 120092

Published: May 17, 2023

Language: Английский

Citations

36
Space-time cube uncovers spatiotemporal patterns of basin ecological quality and their relationship with water eutrophication DOI
Zhenxiu Cao, Minghui Wu, Dezhi Wang

et al.

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 916, P. 170195 - 170195

Published: Jan. 20, 2024

Language: Английский

Citations

14
Scenario analysis on the management practices and optimization of rural non-point source pollution with the coupling of source-process-end: A case study of the Guishui river basin DOI Creative Commons

Chen Xie,

Leyao Zhang,

Meilin Wang

et al.

Ecological Indicators, Journal Year: 2024, Volume and Issue: 159, P. 111677 - 111677

Published: Feb. 1, 2024

Currently, non-point source (NPS) pollution is the primary contributor to water in river basins. Therefore, assessing benefits of rural management measures and optimizing their allocation are great significance for improving quality. In this study, a SWAT model was firstly constructed NPS simulation optimization based on four-period land use data, which more suitable Guishui River Basin. And then it calibrated verified by using monitoring data. On basis spatiotemporal evolution total nitrogen (TN) phosphorus (TP) Basin from 2007 2019, priority control areas TP TN were identified RUSLE additive models. Next, seven scenarios designed perspectives hydrological response units (HRUs), sub-basins, basin scales. Finally, cost-effectiveness each scenario quantitatively evaluated, optimal scheme determined. Results showed that amounts lower than TN, showing fluctuating downward trend, spatial distribution high central low north southeast. Compared effect measures, found process interception effective landscape reducing TN. Among them, vegetation filter strips (FS) grassed waterways (GW) had environmental better reduction. As 20% chemical fertilizer reduction (FRT20) relative effects pollutants 10% (FRT10) no-tillage (NTIL). When refers management, return farmland forest (CFTF) not much different GW. Considering costs optimized allocation, combination FRT20, FS CFTF benefits, while FRT20 higher cost-effectiveness. government should emission, strengthen pay attention end-of-pipe treatment downstream. These conclusions can provide scientific prevention,

Language: Английский

Citations

10
Incorporating Traditional Knowledge into Science-Based Sociotechnical Measures in Upper Watershed Management: Theoretical Framework, Existing Practices and the Way Forward DOI Open Access
Hunggul Yudono Setio Hadi Nugroho,

M. Kudeng Sallata,

Merryana Kiding Allo

et al.

Sustainability, Journal Year: 2023, Volume and Issue: 15(4), P. 3502 - 3502

Published: Feb. 14, 2023

In Indonesia, 2145 watersheds currently need to be restored, where around 21 million people spread over ± 23,000 villages live below the poverty line with a high dependence on forests. This condition requires an integrated approach in watershed management, which is aimed at technically restoring environmental conditions and ensuring welfare of it. One strategic approaches that can taken revive local wisdom traditional knowledge (TK), has been eroded neglected, integrate them technical based modern science knowledge. Based author’s research literature studies, this paper discusses theoretical framework implementation practices integrating into science-based sociotechnical system manage upstream sustainably. empirical evidence, efforts create good biophysical socio-economic only achieved through active participation farmers adopting scientific technology their integration realized designing implementing management by considering principles suitability, applicability, feasibility, acceptability. long term, it necessary document TK, patent it, transfer next generation ensure indigenous peoples’ communities’ social, cultural, economic interests are protected.

Language: Английский

Citations

20
Integrated effects of co-evolutions among climate, land use and vegetation growing dynamics to changes of runoff quantity and quality DOI
Di Chang, Shuo Li, Zhengqing Lai

et al.

Journal of Environmental Management, Journal Year: 2023, Volume and Issue: 331, P. 117195 - 117195

Published: Jan. 9, 2023

Language: Английский

Citations

15
Attribution and driving force of nitrogen losses from the Taihu Lake Basin by the InVEST and GeoDetector models DOI Creative Commons

Xinghua He,

Jiaming Tian,

Zhang Yan-qin

et al.

Scientific Reports, Journal Year: 2023, Volume and Issue: 13(1)

Published: May 8, 2023

Quantifying temporal and spatial changes in reactive nitrogen (Nr) losses from a watershed exploring its main drivers are the key to water quality improvements. Huge Nr continue threaten safety of environment Taihu Lake Basin (TLB). Here, InVEST GeoDetector models were combined estimate TLB 1990 2020 explore driving forces. Different scenarios for compared, showing that loss peaked at 181.66 × 103 t 2000. The factors affecting land use, followed by elevation, soil, slope factors, their mean q-values 0.82, 0.52, 0.51, 0.48, respectively. scenario analysis revealed increased under business-as-usual economic development scenarios, while ecological conservation, nutrient use efficiency, reduced application all contribute reduction losses. findings provide scientific reference control future planning TLB.

Language: Английский

Citations

15
Difference in the Contribution of Driving Factors to Nitrogen Loss With Surface Runoff Between the Hill and Plain Agricultural Watersheds DOI
Zhen Cui, Cheng Chen, Qiuwen Chen

et al.

Journal of Geophysical Research Biogeosciences, Journal Year: 2024, Volume and Issue: 129(3)

Published: March 1, 2024

Abstract Identifying the factors and quantifying their contributions to nitrogen (N) loss associated with surface runoff is of great significance control non‐point source N pollution. However, distinct geographical units, such as hills plains, may lead differences in contribution these driving factors, which has been rarely investigated. This study developed an effective framework, simulated plains by SWAT NDP, analyzed spatial distribution variations autocorrelation analysis, distinguished multi‐scenario simulation partial redundancy analysis (pRDA). The framework was instantiated a hill plain agricultural watershed, respectively, upper Taihu Lake Basin, China. We found fertilization (10.4%) greater than that (6.4%), be due increment effect paddy land. rainfall (93.2%) (74.3%), urban could provide viable way environmental impacts natural anthropogenic drivers different types watersheds, thus offer scientific references for nutrient measures.

Language: Английский

Citations

4