Deep soil water dynamics in an undisturbed primary forest in central Amazonia: Differences between normal years and the 2005 drought

2017 ◽  
Vol 31 (9) ◽  
pp. 1749-1759 ◽  
Author(s):  
Elisângela Broedel ◽  
Javier Tomasella ◽  
Luiz Antônio Cândido ◽  
Celso von Randow
Keyword(s):  
Soil Water ◽  
Water Dynamics ◽  
Primary Forest ◽  
Soil Water Dynamics ◽  
Deep Soil ◽  
Central Amazonia

scholarly journals Simulation of Soil Water Dynamics in a Black Locust Plantation on the Loess Plateau, Western Shanxi Province, China

Water ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 1213
Author(s):  
Yuting Li ◽  
Yang Yu ◽  
Ruoxiu Sun ◽  
Mingshuang Shen ◽  
Jianjun Zhang
Keyword(s):  
Soil Water ◽  
Black Locust ◽  
Robinia Pseudoacacia ◽  
Water Flux ◽  
Vegetation Restoration ◽  
Water Dynamics ◽  
Soil Water Dynamics ◽  
Deep Soil ◽  
Rainfall Events ◽  
Annual Water

Soil moisture plays an important role in vegetation restoration and ecosystem rehabilitation in fragile regions. Therefore, understanding the soil water dynamics and water budget in soil is a key target for vegetation restoration and watershed management. In this study, to quantitatively estimate the water budget of the GFGP forests in a dry year and a wet year and to explore the recharge in deep profiles, the vertical and temporal soil moisture variations in a black locust (Robinia pseudoacacia) plantation were simulated under typical rainfall events and two-year cycles in a loess area between April 2014 and March 2016. We calibrated and tested the HYDRUS-1D (Salinity Laboratory of the USDA, California, USA) model using the data collected during in situ field observations. The model’s performance was satisfactory, the R2, Nash efficiency coefficient (NSE), root mean square error (RMSE), and mean absolute error (MAE) were 0.82, 0.80, 0.021, and 0.030, respectively. For the four rainfall events of 9.1 mm, 25 mm, 71.1 mm, and 123.6 mm, the infiltration amounts were 8.1 mm, 19.3 mm, 65.2 mm, and 95.3 mm, respectively. Moreover, the maximum infiltration depths were 30 cm, 100 cm, 160 cm, and >200 cm, respectively. Additionally, in the two-year model cycles, the upward average water flux was 1.4 mm/d and the downward water flux was 1.69 mm/d in the first-year cycle; the upward average annual water flux was 1.0 mm/d and the downward water flux was 1.1 mm/d in the second-year cycle. The annual water consumption amounts in the two-year cycles were 524.6 mm and 374.2 mm, and the annual replenishment amounts were 616.8 mm and 401 mm. The amounts of percolation that recharged the deep soil were only 28.1 mm and 2.04 mm. A lower annual rainfall would cause a water deficit in the deep soil, which was not conducive to the growth of Robinia pseudoacacia vegetation. To ensure the high-quality sustainable development of the forest land, it is suggested to adjust the stand density in a timely manner and to implement horizontal terraces to increase the infiltration and supply of precipitation. Our study provides an improved understanding of the soil water movement in Robinia pseudoacacia plantations and a simulated temporal moisture variation under different time scales. The results of our study provide a feasible approach for the sustainable management of Robinia pseudoacacia plantations during vegetation restoration.

Deep Soil Water Dynamics and Depletion by Secondary Vegetation in the Eastern Amazon

2003 ◽  
Vol 67 (6) ◽  
pp. 1672-1686 ◽  
Author(s):  
Rolf Sommer ◽  
Horst Fölster ◽  
Konrad Vielhauer ◽  
Eduardo J. Maklouf Carvalho ◽  
Paul L. G. Vlek
Keyword(s):  
Soil Water ◽  
Water Dynamics ◽  
Soil Water Dynamics ◽  
Deep Soil ◽  
Secondary Vegetation

Soil water dynamics and deep soil recharge in a record wet year in the southern Loess Plateau of China

2010 ◽  
Vol 97 (8) ◽  
pp. 1133-1138 ◽  
Author(s):  
Wenzhao Liu ◽  
X.-C. Zhang ◽  
Tinghui Dang ◽  
Zhu Ouyang ◽  
Zhi Li ◽  
...  
Keyword(s):  
Soil Water ◽  
Loess Plateau ◽  
Water Dynamics ◽  
Soil Water Dynamics ◽  
Deep Soil

scholarly journals Testing the EPIC Richards submodel for simulating soil water dynamics under different bottom boundary conditions

2021 ◽  
Author(s):  
Matteo Longo ◽  
Curtis Dinnen Jones ◽  
Roberto César Izaurralde ◽  
Miguel L. Cabrera ◽  
Nicola Dal Ferro ◽  
...  
Keyword(s):  
Boundary Conditions ◽  
Soil Water ◽  
Water Dynamics ◽  
Soil Water Dynamics ◽  
Bottom Boundary

Numerical routine for soil water dynamics from trickle irrigation

2020 ◽  
Vol 83 ◽  
pp. 371-385 ◽  
Author(s):  
Ángel del Vigo ◽  
Sergio Zubelzu ◽  
Luis Juana
Keyword(s):  
Soil Water ◽  
Water Dynamics ◽  
Trickle Irrigation ◽  
Soil Water Dynamics

scholarly journals Analysis of Soil Water Response to Grass Transpiration

2013 ◽  
Vol 1 (No. 3) ◽  
pp. 85-98
Author(s):  
Dohnal Michal ◽  
Dušek Jaromír ◽  
Vogel Tomáš ◽  
Herza Jiří
Keyword(s):  
Soil Water ◽  
Water Uptake ◽  
Preferential Flow ◽  
Water Movement ◽  
Control Volume ◽  
Water Pressure ◽  
Lower Boundary ◽  
Root Water Uptake ◽  
Water Dynamics ◽  
Soil Water Dynamics

This paper focuses on numerical modelling of soil water movement in response to the root water uptake that is driven by transpiration. The flow of water in a lysimeter, installed at a grass covered hillslope site in a small headwater catchment, is analysed by means of numerical simulation. The lysimeter system provides a well defined control volume with boundary fluxes measured and soil water pressure continuously monitored. The evapotranspiration intensity is estimated by the Penman-Monteith method and compared with the measured lysimeter soil water loss and the simulated root water uptake. Variably saturated flow of water in the lysimeter is simulated using one-dimensional dual-permeability model based on the numerical solution of the Richards’ equation. The availability of water for the root water uptake is determined by the evaluation of the plant water stress function, integrated in the soil water flow model. Different lower boundary conditions are tested to compare the soil water dynamics inside and outside the lysimeter. Special attention is paid to the possible influence of the preferential flow effects on the lysimeter soil water balance. The adopted modelling approach provides a useful and flexible framework for numerical analysis of soil water dynamics in response to the plant transpiration.

Monitoring and modelling soil water dynamics using electromagnetic conductivity imaging and the ensemble Kalman filter

Geoderma ◽  
2017 ◽  
Vol 285 ◽  
pp. 76-93 ◽  
Author(s):  
Jingyi Huang ◽  
Alex B. McBratney ◽  
Budiman Minasny ◽  
John Triantafilis
Keyword(s):  
Kalman Filter ◽  
Soil Water ◽  
Ensemble Kalman Filter ◽  
Water Dynamics ◽  
Soil Water Dynamics ◽  
Conductivity Imaging

SIMULATION OF SOIL WATER DYNAMICS IN LAYERED SOILS

Soil Science ◽  
1977 ◽  
Vol 123 (1) ◽  
pp. 54-62 ◽  
Author(s):  
D. HILLEL ◽  
H. TALPAZ
Keyword(s):  
Soil Water ◽  
Water Dynamics ◽  
Layered Soils ◽  
Soil Water Dynamics
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