Daily precipitation changes in the semi-arid region over northern China

2004 ◽  
Vol 59 (4) ◽  
pp. 771-784 ◽  
Author(s):  
Dao-Yi Gong ◽  
Pei-Jun Shi ◽  
Jing-Ai Wang
Keyword(s):  
Arid Region ◽  
Daily Precipitation ◽  
Northern China ◽  
Semi Arid Region ◽  
Precipitation Changes ◽  
Semi Arid

scholarly journals Complexity and predictability of daily precipitation in a semi-arid region: an application to Ceará, Brazil

2006 ◽  
Vol 13 (6) ◽  
pp. 651-659 ◽  
Author(s):  
M. E. S. Silva ◽  
L. M. V. Carvalho ◽  
M. A. F. da Silva Dias ◽  
T. de M. B. S. Xavier
Keyword(s):  
Arid Region ◽  
Daily Precipitation ◽  
Large Degree ◽  
Inter Tropical Convergence Zone ◽  
Periodic Sequences ◽  
Precipitation Regimes ◽  
Ocean Topography ◽  
Semi Arid Region ◽  
Precipitation Records ◽  
Semi Arid

Abstract. Complexity and predictability of daily precipitation in a tropical semi-arid region (Ceará State, Brazil) is assessed by applying entropy concepts. Precipitation regimes in that region depend on several dynamical forcings, the most important being the displacement and activity of the Inter-tropical Convergence Zone in the Atlantic Ocean. Topography is another important factor that influences the spatial distribution of rainfall in the region. A hierarchical approach based on sequences of events of different lengths is used to estimate complexity of daily precipitation records. It is shown that precipitation in Ceará exhibit more random than periodic sequences, which indicates a large degree of complexity. Nevertheless, there is indication of potentially inherent rules in the precipitation time-series that could ultimately improve prediction on time-scales between 9–11 days. It is suggested that synoptic-scale disturbances (1–8 days) represent important sources of rules in the precipitation regimes in this region.

Biophysical controls on nocturnal sap flow in plantation forests in a semi-arid region of northern China

2020 ◽  
Vol 284 ◽  
pp. 107904
Author(s):  
Zuosinan Chen ◽  
Zhiqiang Zhang ◽  
Ge Sun ◽  
Lixin Chen ◽  
Hang Xu ◽  
...  
Keyword(s):  
Sap Flow ◽  
Arid Region ◽  
Northern China ◽  
Plantation Forests ◽  
Semi Arid Region ◽  
Biophysical Controls ◽  
Semi Arid

Identification of geochemical processes by hydrogeochemical analysis in karst aquifers of a semi-arid region, Northern China

2017 ◽  
Vol 34 (2) ◽  
pp. 297-313
Author(s):  
Min Yang ◽  
Yaoru Lu ◽  
Feng’e Zhang ◽  
Sheng Zhang ◽  
Miying Yin ◽  
...  
Keyword(s):  
Arid Region ◽  
Northern China ◽  
Karst Aquifers ◽  
Geochemical Processes ◽  
Semi Arid Region ◽  
Semi Arid

Nitrogen resorption from senescing leaves in 28 plant species in a semi-arid region of northern China

2005 ◽  
Vol 63 (1) ◽  
pp. 191-202 ◽  
Author(s):  
Z.-Y. Yuan ◽  
L.-H. Li ◽  
X.-G. Han ◽  
J.-H. Huang ◽  
G.-M. Jiang ◽  
...  
Keyword(s):  
Plant Species ◽  
Arid Region ◽  
Northern China ◽  
Nitrogen Resorption ◽  
Semi Arid Region ◽  
Semi Arid

scholarly journals Responses of Soil Seed Bank and Vegetation to the Increasing Intensity of Human Disturbance in a Semi-Arid Region of Northern China

2017 ◽  
Vol 9 (10) ◽  
pp. 1837 ◽  
Author(s):  
Cui Li ◽  
Bo Xiao ◽  
Qinghai Wang ◽  
Ruilun Zheng ◽  
Juying Wu
Keyword(s):  
Seed Bank ◽  
Human Disturbance ◽  
Arid Region ◽  
Soil Seed Bank ◽  
Northern China ◽  
Semi Arid Region ◽  
Semi Arid

The effects of gap size and age on natural regeneration of Picea mongolica in the semi-arid region of Northern China

New Forests ◽  
2012 ◽  
Vol 44 (2) ◽  
pp. 297-310 ◽  
Author(s):  
Chao Zhang ◽  
Chun Jing Zou ◽  
Heli Peltola ◽  
Kai Yun Wang ◽  
Wen Duo Xu
Keyword(s):  
Natural Regeneration ◽  
Arid Region ◽  
Northern China ◽  
Gap Size ◽  
Picea Mongolica ◽  
Semi Arid Region ◽  
Semi Arid

scholarly journals Avaliação da aplicação de modelos de desprendimento em bacia experimental do semiárido brasileiro

2021 ◽  
Vol 14 (1) ◽  
pp. 396
Author(s):  
Paulo Roberto De Souza Silveira ◽  
George Leite Mamede
Keyword(s):  
Arid Region ◽  
Daily Precipitation ◽  
Drainage Network ◽  
Catchment Basin ◽  
Caatinga Biome ◽  
Slope Sediment ◽  
Main Factors ◽  
Semi Arid Region ◽  
Experimental Basin ◽  
Semi Arid

Granulometria é um dos principais fatores que afetam a dinâmica de sedimentos em bacias hidrográficas, desde seu desprendimento do solo matriz até o transporte ou deposição pela rede e reservatório. Objetivou-se com esse trabalho analisar o comportamento granulométrico dos sedimentos em uma bacia do semiárido brasileiro, no bioma Caatinga e analisar a eficiência da aplicação de modelos de estimativa do padrão granulométrico do sedimentos desprendido das encostas. O estudo foi realizado na bacia hidrográfica do Pentecoste, situada no semiárido do Ceará. A parte experimental da pesquisa foi realizada na Bacia Experimental do Vale do Curú (BEVC) com coleta de dados pluviométricos e hidrossedimentológicos, amostras de solo da bacia de captação, precipitação diária e de escoamentos superficiais, durante a quadra chuvosa entre os anos de 2015 e 2017. Modelos de desprendimento de sedimentos divulgados na literatura foram testados e aplicados para a área de estudo. Os resultados mostraram que o modelo de desprendimento de sedimento da encosta proposto por Foster et al. (1981) apresentou os melhores resultados quando comparado aos demais, com coeficiente de Nash e Sutcliff (NS) de 0,99, em ambiente de cobertura vegetal mista. Evaluation of the application of detachment models in the experimental basin of the Brazilian semi-arid region A B S T R A C TSize grain is one of the main factors that affect sediment dynamics in watersheds, from its detachment from the soil to the transport or deposition through the drainage network and reservoir. The objective of this research was to analyze the granulometric behavior of the sediments in a Brazilian semi-arid basin in the Caatinga biome and to analyze the efficiency of the application of models for the estimation of the granulometric pattern of sediments detached on slopes. The study was carried out in the Pentecost basin, located in the semi-arid region of Ceará. The experimental part of the research was conducted in the Curú Valley Experimental Basin (BEVC) with rainfall and hydrosedimentological data collection, soil samples from the catchment basin, daily precipitation and surface runoff during the rainy season between 2015 and 2017. Models of sediment release disclosed in the literature were tested and applied to the study area. The results showed that the slope sediment detachment model proposed by Foster et al. (1981) presented the best results when compared to the others, with Nash and Sutcliff coefficient (NS) of 0.99, under mixed vegetation cover.Keywords: size grain, Foster model, Experimental Basin of the Curú Valley, Caatinga biome.

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