The Yellow River Source Area is located in the ecological protection and restoration area of Sanjiangyuan China, which has been deteriorating as a result human-caused overgrazing grassland destruction caused by plateau rats rabbits, well influence other natural factors. an important that implements Three Rivers Region, where ecologically vulnerable areas are great significance to implementation national land space should be identified early warning extended. This measure can help us identify...

Soil nutrients play vital roles in vegetation growth and are a key indicator of land degradation. Accurate, rapid, non-destructive measurement the soil nutrient content is important for ecological conservation, degradation monitoring, precision farming. Currently, visible near-infrared (Vis-NIR) spectroscopy allows rapid monitoring nutrients. However, performance Vis-NIR inversion models extremely dependent on number samples. Limited samples may lead to low prediction accuracy models....

The production of cereals, including rice, wheat, and maize has increased in China over the past 20 years. However, variations cultivated area cereals remains unclear. In this study, we collected analyzed cereal from 1998 to 2016. An 85% increase was recorded 2016, due an along with area. Meanwhile, rice wheat have been stable since 2000. No change occurred through a 19% decrease observed 2016 relative 1998. addition, significant positive relationship among production, (p < 0.0001)....

Plateau zokors (Eospalax baileyi) are an agent actively involved in causing soil erosion and meadow degradation the Yellow River Source Zone of West China. This study aims to quantify amount nutrient loss from zokor mounds relation slope gradient rainfall intensity, assess zokor-infested areas compared with healthy meadows Henan County, Qinghai Province. The results showed that were gradually lowered at a rate 1.8–3.9 cm h−1. Soil occurred two min after rain began, reaching maximum level...

A reasonable evaluation of the ecological risk status landscape in Yellow River source area is practical significance for optimizing regional pattern and maintaining ecosystem function. To explore heterogeneity watershed landscape, a model constructed to evaluate 20 years, correlation analysis used further reveal characteristics relationship between land use. The results show that rapid expansion urbanization increasing intensity development use has caused significant changes environment...

Visible and near-infrared spectroscopy (Vis–NIR, 350–1100 nm) has great potential for predicting soil properties. However, current research on the hyperspectral prediction of parameters in agricultural areas alpine regions types included is limited, optimal spectral treatments predictive models applicable to different have not been sufficiently investigated. Therefore, we evaluated accuracy total nitrogen (TN), phosphorus pentoxide (TP2O5), potassium oxide (TK2O), alkali-hydrolyzable (AHN),...

Degraded bald patches have been active influencing factors in recent years, leading to meadow degradation and soil erosion the Yellow River source area. In this study, we aimed quantify water patterns hydrodynamic characteristics of degraded under different vegetation coverage (10%, 30%, 50%, 70% 90%) slope (10°, 20° 30°) combination treatments through simulated rainfall experiments, investigate influence rodent activities on using zokor mound bare ground as a control. The results show that...

Water supply constraints are recognized as major factors affecting regional dryland wheat production, but the details of these have yet to be fully explored. We performed an analysis field experiments conducted in northern Chinese areas during 1950–2017. Dryland yields increased from 1950s through 2010s at a rate 110 kg ha–1 year–1. Yields most regions with relatively high precipitation growth stage. Mean were 128% higher >300 mm than <100 mm. highest when mean temperatures stage range...

In order to clarify the mutation characteristics of alpine vegetation cover, a study coverage change and its climate response relationship was carried out in Qinghai province based on AVHRR NDVI_3g, temperature, precipitation, wind speed sunshine data from 1982-2015. The results show that overall NDVI series area had mutant 1998 2005, with mutants near 1987 wet semi-humid areas, then increase rate slowed down, clear trend arid areas after 2007. Temperature changes significant...

The importance of ecological protection cannot be ignored. This study starts from the source area Yellow River and uses a novel "service-sensitivity-security" assessment framework to assess protection. results are indicated as follows: (1) areas with high distributed in east, north, west, accounting for 73.41% area. (2) ecosystem service functions mainly carbon fixation water conservation. (3) main problem sensitivity is soil erosion. (4) safety zone located middle area, which indicates that...

Plateau pika (Ochotona curzoniae) is a key species of alpine meadow ecosystem in Qinghai–Tibet Plateau. In this study, an observation and classification system plateau disturbance intensity was constructed by multidimensional stereoscopic surveying, visual interpretation, geostatistics, principal component analysis, clustering which can monitor evaluate the activities comprehensively, scientifically, efficiently head-water region Yellow River. The results show that (1) digital elevation...

Abstract Quantitative Remote Sensing product have many challenges and uncertainties used in Tibet plateau, GIMMS NDVI 3g is the longest time series products reflected vegetation growing changing at present. This paper takes Qinghai plateau as example, using multi-source remote sensing data including SPOT, MODIS Landsat to analyze its suitability evaluate accuracy. The results indicate that value of bigger than others dataset, there has no significant difference between datasets according...

The plateau pika (Ochotona curzoniae) actively contributes to soil erosion and meadow degradation in western China’s Yellow River source zone. This study aimed elucidate the effects of mound numbers on hydrodynamic characteristics water through simulated rainfall experiments. inhibition restored vegetation growth were explored using a revegetated as control. results showed that at intensity 30 mm/h, loss per unit time increased then decreased with 15–20 min duration was sensitive period for...

In order to study the spatial distribution characteristics and causes of Heifangtai landslide in Gansu Province, sentinel- 1A images from September 2017 November 2020 were used as data source extract surface subsidence information area using SBAS technology, high coherence point D1 Dangchuan village was selected, analyzed by combining irrigation, rainfall temperature data. And BP neural network predict point. The results showed that: (1) identified technology mainly spread Xinyuan village,...

Abstract. The Qinghai-Tibet Plateau ecosystem is sensitive and fragile, the grassland degradation soil erosion in plateau are still increasing. In this paper, we conducted a quantitative study to clarify characteristics of land use/land cover change, driving factors, environmental effects plateau. We focused on northeastern as an example, created use change matrices determined relative rate, vegetation cover, quality index using data NDVI3g from 1980 2015. results show that there were...