Abstract Spatial heterogeneity of soil has great impacts on dynamic processes the hydrological systems. However, it is challenging and expensive to obtain spatial distribution hydraulic properties, which often requires extensive sampling observations intensive laboratory analyses, especially in high elevation, hard access mountainous areas. This study evaluates process a topographically complex watershed Northwest China. Two approaches were used derive properties watershed: (1) clustering...

The calibration of hydrological models is often complex in regions with scarce data, and generally only uses site-based streamflow data. However, this approach will yield highly generalised values for all model parameters processes. It therefore necessary to obtain more spatially heterogeneous observation data (e.g., satellite-based evapotranspiration (ET)) calibrate such models. Here, soil water assessment tool (SWAT) were built evaluate the advantages using ET derived from Global Land...

Climate change and land use/land cover (LULC) have received widespread attention as the two main factors contributing to shrinking of plant habitats. However, different effects these on understory economic tree species are not clear. This is conducive conservation exploitation forest resources. Here, we used distribution modeling predict extent which climate LULC will affect changes in suitable habitats for A. elata under scenarios future. The results showed habitat be located Changbai...

A distributed physically based model, soil and water assessment tool (SWAT), a conceptual large basin runoff model (DLBRM), were selected to compare their applicability performance in simulating daily the Heihe River watershed, second-largest inland river (terminal lake) with peak elevation of 5,584 m above sea level (asl) arid northwest China. Both models have been calibrated against observed at watershed outlet (Yingluoxia Hydrological Station) for period 1995–2004 validated 2005–2009....

Young shoots of Aralia elata and young leaves Eleutherococcus senticosus are two major non-timber forest products in northeastern China. However, human activities climate change have resulted serious threats to the habitats trees, which greatly limits resource conservation exploitation economic trees. We used MaxEnt model predict suitable trees analyzed dominant factors affecting their distribution. The results showed that habitat areas A. E. current period were 159950 km 2 123449 ,...

Irrigation is a vital measure for maintaining grassland productivity in arid and semi-arid regions. Grasslands typically have characteristics such as unclear boundaries, complex vegetation types, relatively small irrigation amounts, making it challenging to extract information. Currently, research on extracting information scarce. This study proposes method using high spatiotemporal resolution (30 m, 1 day) downscaled surface soil moisture data, combined with Landsat 8/9 Sentinel 1/2 data....

Grasslands are the main land cover type and one of most important ecosystems in arid alpine endorheic basins. The vegetation coverage grasslands is spatially heterogeneous areas it may lead to variations water allocation. Soil Water Assessment Tool (SWAT) widely used semi-distributed catchment-scale eco-hydrological models. leaf area index (LAI) indexes incorporated SWAT model. However, SWAT, LAI accumulation controlled by heat, neglects other relevant factors such as precipitation terrain....

Waterlogging refers to the damage plants by water stress due excess soil in crop’s root zone that exceeds maximum holding capacity of field. It is one major disasters affecting agricultural production. This study aims add a crop waterlogging identification module coupled SWAT (Soil and Water Assessment Tools)-MODFLOW (Modular Finite Difference Groundwater Flow Model) model accurately identify predict risk areas under CMIP6 (Coupled Model Intercomparison Project 6) climate scenarios. The...

Interactions between surface water and groundwater are dynamic complex in large endorheic river watersheds Northwest China due to the influence of both irrigation practices local terrain. These interactions interchange numerous times throughout middle reaches, making streamflow simulation a challenge watersheds. In this study, we modified linear-reservoir module SWAT (Soil Water Assessment Tools, widely used hydrological model) with new nonlinear relationship better represent processes; then...

Land use/cover change (LUCC) affects canopy interception, soil infiltration, land-surface evapotranspiration (ET), and other hydrological parameters during rainfall, which in turn the regimes runoff mechanisms of river basins. Physically based distributed (or semi-distributed) models play an important role interpreting predicting effects LUCC on processes However, conventional models, such as water assessment tool (SWAT), generally assume that no takes place simulation period to simplify...

环境一号星座的A星(HJ-1A)上搭载了超光谱成像仪(HSI), 它是具有高光谱分辨率的全新国产遥感数据源, 为水质遥感特别是内陆水质遥感提供了新的高光谱数据.但HSI影像的处理方法尚不完善, 在广泛应用于水质遥感前对其进行质量研究和评价非常必要.本文针对HSI数据在巢湖水质监测应用方面的适宜性, 对信噪比和数据真实性、倾斜条纹去除方法、大气校正方法等方面分别进行了评价.结果表明, HSI水体图像在530-900nm波段范围内数据质量较为真实可靠;6S与FLAASH方法均能有效去除大气效应, 在530-830nm范围内效果较好。;The hyperspectral imager(HSI) is loaded on the HJ-1A satellite, which a new source of home-made data with high spectral resolution and provides remote sensing for water quality, especially lake quality monitoring.Because...

Abstract Aquatic ecosystem response to dam construction and operation is an important concern, but systematic assessment of impacts induced by cascade small rubber dams are seriously lacking. In this study, the Huangshui River in Qinghai Province was selected investigate biological dams. Two years monitoring data 2018 2019 were utilized quantify variation five kinds aquatic organisms. Results indicate continuous produced significant changes hydrological regimes rivers, especially for high...

Vegetation change in arid areas may lead to the redistribution of regional water resources, which can intensify competition between ecosystems and humans for resources. This study aimed accurately model impact vegetation on hydrological processes an endorheic river watershed undergoing revegetation, namely, middle lower reaches Bayin River basin, China. A LU-SWAT-MODFLOW was developed by integrating dynamic response units with a coupled SWAT-MODFLOW model, reflect actual land cover changes...

Lake carbon cycle in lake ecosystems is critical for regional management. The application of isotope techniques to terrestrial and aquatic can accurately elucidate flow cycling. on the Qinghai–Tibetan Plateau are fragile sensitive climate environment changes, impact isotopic composition (δ13C) dissolved inorganic (DIC) these systems has not been well studied, limiting ability devise effective management strategies. This study explored relationship among δ13C position DIC (δ13CDIC) Genggahai...