Designing floods in ungauged watersheds with limited data is a significant challenge water conservancy projects. To address this, the method of calculating design flood peak and volume using weighted average was proposed, which based on instantaneous unit hydrograph inference formula method, combined characteristics heavy rainfall watersheds. The calculation results are analyzed terms reasonableness through distribution pattern modulus under different frequencies constructed reservoirs,...

In order to facilitate watershed management, we developed an expansive river health assessment method based on a fuzzy matter-element extension model in this study that the transitive hierarchies and degree of membership from improved optimization theory. Eight characteristics flow, namely, morphology, water quality, habitat, aquatic organisms, riparian zone, flood control safety, level supply, were investigated establish system indices assess health. We apply above Luanhe River as...

Abstract Migration is often seen as an adaptive human response to adverse socio-environmental conditions, such water scarcity. A rigorous assessment of the causes migration, however, requires reliable information on migration in question and related variables, as, unemployment, which missing. This study explores one type from rural urban areas, Jiangsu province China. model developed fill a gap understanding how responds variations inputs agricultural production including availability labor...

Construction and operation of the Three Gorges Dam (TGD) has significantly altered downstream hydrological regime along Yangtze River, which in turn affected environment, biodiversity morphological configuration, human development. The ecological environmental systems middle lower River have been adversely, with ecosystems Poyang Lake its deltas being among most damaged. Besides posing a potential threat to survival migrant birds aquatic species, TGD also population, particularly respect...

Abstract Streamflow simulation of the headwater catchment Yellow River basin (HCYRB) in China is important for water resources management basin. A statistical‐dynamical model, combining regular vine copulas with an optimization method structure estimation, presented application simulating monthly streamflow local climate drivers at HCYRB. Local every month are analyzed using rank‐based correlation. Precipitation, evaporation, and temperature generally show strong associations streamflow....

Understanding the rate and process of land-use/land-cover (LULC) change in a watershed is essential for managing natural resources achieving sustainable development. Therefore, this study aims to analyze historical LULC from 1980 2010 project future changes 2030, 2060, 2090 Guanting Reservoir Basin (GRB), China, critical water-supplying China’s capital Beijing, through scenario-based simulations. Two scenarios, ‘business-as-usual’ ‘governance’ (Gov), were projected using Cellular...

The operation of water resources is inherently complex, necessitating the reconciliation competing objectives, cooperation interconnected infrastructures, and adherence to various regulations stakeholder perspectives. Multi-objective optimization methods have emerged as powerful tools for addressing these complexities by enabling decision-makers balance conflicting goals. effectiveness contingent upon input variables utilized in resource models. However, often find it challenging understand...

Abstract The impacts of climate change and human activity, combined with streamflow reduction in the Yellow River Basin, have presented significant challenges to water resource management strategies. Here, trends points were determined for period 1956–2017 via five statistical methods. A runoff-sensitive coefficients method (the Budyko hypothesis) a conceptual rainfall–runoff model TUW model) applied assess variation. following conclusions ascertained: (1) 1989, 1986, 1990 upstream...

The Tarim River (TR), the longest inland river at an arid area in China, plays a critical role sustainable development of regional ecological environment. This study presents spatial-temporal variations vegetation coverage and pixel scales its driving factors on TR mainstream. latest dataset normalized difference index (NDVI) (fc) over period from 2000–2015 were analyzed with unary linear regression partial correlation. On basis land use data, we further built landscape risk assessed level...

Global climate change is presenting a variety of challenges to hydrology and water resources because it strongly affects the hydrologic cycle, runoff, supply demand. In this study, we assessed effects scenarios on hydrological variables (i.e., evapotranspiration runoff) by linking outputs from global model (GCM) with Soil Water Assessment Tool (SWAT) for case study in Lijiang River Basin, China. We selected bias correction methods their combinations correct lower resolution GCM both...

Reservoir system on the Upper Yellow River Basin (UYRB), China. A multipurpose reservoir with multi-year regulation capacity calls for new optimization high efficiency owing to curse of dimensionality. This paper presents a state-of-the-art large-scale multi-objective evolutionary algorithm (LSMOEA), called weight framework (WOF) Non-dominated Sorting Genetic Algorithm II (NSGAII) optimizer, alleviate problem, and improve its performance by determining applicable grouping mechanism based...

With rapid economic and social development, human activities, such as the construction of reservoirs, have satisfied many needs. However, these activities also caused changes in hydrological ecosystem basin, impacting river biodiversity. The establishment Shanxi Reservoir within Feiyun River Basin has inevitably altered system, which was previously shaped primarily by precipitation. This study comprehensively evaluates impact on alteration basin. Two ecological flow indicators, ecosurplus...

This study aims to explore the optimization of reservoir operation in Jinsha River, accounting for both economic and ecological needs. Power generation was set as an objective express needs, while water supply, shipping, flood control were considered restrictions. The distribution flow method (DFM) based on Pearson-III curve proposed calculate most optimal (MOEF). Additionally, minimal difference between outflow MOEF reflect Results indicated that DFM more objective, effective, convenient...

Trend detection based on hydroclimatological time series is crucial for understanding climate change. In this study, the innovative trend analysis (ITA) method was applied to investigate trends in air temperature and precipitation over Jinsha River Basin (JRB), China, from 1961 2016 40 meteorological stations. Climatic factors were divided into three categories according percentile, hidden evaluated separately. The ITA results show that annual seasonal temperatures have significantly...

Fishes are at the top of aquatic food chain, best indicators health status ecosystems and organisms most sensitive to changes in ecological environment. Given shortcomings commonly used river physical habitat models that only consider hydraulic factors, a two-dimensional (2D) eco-hydrodynamic model, containing eco-hydrological elements, was constructed using identified driving forces evolution rivers. The main hydrological elements water depth flow velocity, while NH3-N, chemical oxygen...

Changes in the hydrological cycle and water resources are inevitable consequences of environmental change, runoff is an important element cycle. Therefore, assessment changes crucial for management socio-economic development. As inland river basin arid zone northwest China, Shiyang River Basin very vulnerable to changes. Consequently, this study evaluated past evolution using a variety statistical tools. In addition, improved Soil Water Assessment Tool (SWAT) was used predict trends from...