Abstract Water in motion presented natural systems contains a rich source of renewable mechanical energy. Harvesting this water energy to trigger the generation reactive oxygen species (ROS) for purification is desirable yet underexplored solution. Herein, authors report self‐powered triggered Fenton‐like reaction system wastewater treatment through piezo‐activation peroxymonosulfate (PMS). Isolated protrudent Fe single atomic sites are immobilized on surface molybdenum disulfide (MoS 2 )...

Recent studies revealed that the greening in China has difficulty crossing Hu-Line. However, pattern and its driving factors remain unclear. Therefore, we explored NDVI spatio-temporal their key forces between southeastern northwestern of Hu-line from 2000 to 2020 using GDM (the geographical detector model) trend analysis method. The following results were obtained: (1) Overall, showed a fluctuating upward over study period, indicating greening. Although vegetation had improved significantly...

The uneven spatial and temporal distribution of water resources has consistently been one the most significant limiting factors for social development in many regions. Furthermore, with intensification climate change, this inequality is progressively widening, posing a critical challenge to sustainable human societies. construction large-scale projects become crucial means address contradictions between supply demand. Thus, evaluating functional aspects source network structures...

The Nagqu River Basin in the central part of Qinghai–Tibet Plateau, China. Groundwater flow systems permafrost regions are characterized by a unique circulation. Understanding groundwater circulation mechanism is essential for studying hydrological effect degradation alpine regions. In this study, potential water sources and origin solutes typical region were studied using hydrochemistry, 18O, 2H 3H analyses. This research effects degradation. Upon moving from mountainous to plains, renewal...

As environmental and human changes combine, water shortage ecological fragility are becoming increasingly serious issues in the basin. The national "14th Five-Year Plan" proposes to build resilient basins enhance disaster resilience. On basis of clarifying multi-link characteristics resources system resilience under influence meteorology-hydrology-ecology-society-economy, this paper reveals interrelationship chain reaction among factors affecting by Based on interconnections...

The development of park cities is an important exploration for better satisfying people’s aspirations a life, promoting sustainable social development, and advancing the transformation green ecological values. As basic industry combination agriculture urban way to build civilization. Clarifying relationship between city great significance construction base system city, agriculture, integrated rural areas. Chengdu mega-city in western China, Chengdu-led program unique Chinese development....

Drought-flood abrupt alternation (DFAA) is an extreme hydrological phenomenon caused by meteorological anomalies. To combat the climate change, watershed integrated management model—Soil and Water Assessment Tool model (SWAT)—was used to simulate DFAA, total nitrogen (TN) phosphorus (TP) from 1961 2050, based on measured precipitation data in Hetao area downscaled Representative Concentration Pathways (RCPs) scenarios. In future, increase temperature will aggravate pollution of water bodies....

It has become a hot issue to study extreme climate change and its impacts on water quality. In this context, explored the evolution characteristics of drought–flood abrupt alternation (DFAA) total nitrogen (TN) phosphorous (TP) pollution, from 2020 2050, in Luanhe river basin (LRB), based predicted meteorological data representative concentration pathways (RCPs) scenarios simulated surface quality Soil Water Assessment Tool (SWAT) model. The results show that DFAA occurred more frequently...

Administrative strategies to cope with drought are steadily changing, from emergency procedures day-to-day monitoring. More consideration must be paid long-term and preventive control measures in the future. This paper discusses risk of hydrological Yellow River Basin. The standardized runoff index (SRI) was used characterize drought, run theory identify states quantify characteristic variables. Based on severity duration, a development plan proposed three-dimensional copula function...

Human activities and global environmental changes have transformed terrestrial ecosystems, notably increasing vegetation greenness in China. However, this greening is less effective across the Hu Huanyong Line (Hu Line). This study analyzes dynamic driving factors of nine net primary productivities (NPPs) regions divided by using remote sensing data, trend analysis, Geodetector model. Findings reveal that from 2001 to 2022, 38.22% regional NPP China increased, especially Loess Plateau,...

ABSTRACT Flood vulnerability assessment is an important means to cope with urban flood disasters. However, population mobility and land-use changes bring significant uncertainty assessments. In order respond the refined dynamic needs of disaster prevention control, a multi-scale multi-categorized framework that considers real-time was proposed in this study. The used comprehensive function exposure, sensitivity, coping ability under characterize vulnerability, constructed models at both grid...

An environmental water supplement through reservoir regulation is an important way to restore the deltaic coastal wetland. In order quantify impact of on wetland ecosystem, this article proposes a quantitative analysis method for ecological and contribution rate reservoir, which compares status in two scenarios with presence or absence during assessment period, reveals reservoir’s conditions. The results show that 2000–2019, Xiaolangdi Reservoir, average annual drying up days at Lijin...

Abstract Natural flow regime (instream ecological flow) is a vital element of hydrology, serving crucial role in the fundamental functions river ecosystems. Intense human activities, especially reservoir operation, have unavoidably altered Upper Huai River, leading to further impacts on It essential quantify hydrological alterations regimes and their associated ecosystems for effective water management. Ecological indicators, namely deficit surplus, were analyzed assess instream flow. The...

Increasingly severe flooding seriously threatens urban safety. A scientific flood-bearing vulnerability assessment model is significant to improve risk management capacity. The gray target (GTM) has advantages in assessment. However, indicator correlation and single bull's-eye are commonly neglected, leading defective evaluation results. By integrating the four base weights, an improved weighting method based on moment estimate was proposed. Then, marginal distance used quantify correlation,...

Nitrogen is often a limiting nutrient for microbial communities and plants in glacier forefields. Nitrogen-fixing microorganisms (diazotrophs) play an important role providing bioavailable nitrogen, with their composition determining the nitrogen-fixating capacities. This study investigates spatial temporal dynamics of diazotrophs forefields three Tibetan glaciers: Qiangyong, Kuoqionggangri, Longxiazailongba. We collected soil samples from recently deglaciated barren grounds, also along...

Accurate remote sensing retrieval of chlorophyll-α (Chl-α) concentrations in inland waters raises a challenge due to the optical complexity water constituents. Five Chl-α models, including single-band, band ratio, three-band, four-band, and partial least square were established with measured spectra at 36 stations Panjiakou Daheiting Reservoirs. To improve accuracy, three ensemble namely, entropy weight-based model (EW-EM), set pair analysis-based (SPA-EM), Bayesian averaging-based (BMA-EM),...

Extensive studies have been conducted over the whole year and various seasons to characterize temporal spatial changes in vegetation NDVI. However, there are few on variations of NDVI different soil hydrothermal processes alpine region. So we studied spatial-temporal variation cover its responses process Qinghai-Tibet Plateau-alpine Based GIMMS remote sensing images from 1982 2015, Naqu river basin at time scales were by using maximum synthesis method, linear regression. Results show that...