Water Infiltration and Storage affected by Subsoiling and Subsequent Tillage

2003 ◽  
Vol 67 (3) ◽  
pp. 859-866 ◽  
Author(s):  
Joseph L. Pikul ◽  
J. Kristian Aase
Keyword(s):  
Water Infiltration ◽  
And Storage

scholarly journals Surface irrigation management in relation to water infiltration and distribution in soils

2010 ◽  
Vol 5 (No. 3) ◽  
pp. 75-87 ◽  
Author(s):  
A.M. Amer ◽  
K.H. Amer
Keyword(s):  
Soil Water ◽  
Control Method ◽  
Irrigation System ◽  
Irrigation Management ◽  
Furrow Irrigation ◽  
Water Infiltration ◽  
Surface Irrigation ◽  
Empirical Power ◽  
And Storage ◽  
Alluvial Clay

Water infiltration and storage under surface irrigation are evaluated, based on the initial soil water content and inflow rate as well as on the irrigation parameters and efficiencies. For that purpose, a field experiment was conducted using fruitful grape grown in alluvial clay soil at Shebin El-Kom in 2008 grape season. To evaluate the water storage and distribution under partially wetted furrow irrigation in comparison to the traditional border irrigation as a control method, two irrigation treatments were applied. They are known as wet (WT) and dry (DT) treatments, at which water was applied when the available soil water (ASW) reached 65% and 50%, respectively. The coefficient of variation (CV) was 6.2 and 10.2% for WT and DT respectively under the furrow irrigation system as compared to 8.5% in border. Water was deeply percolated as 11.9 and 18.9% for wet and dry furrow treatments respectively, as compared with 11.1% for control with no deficit. The application efficiency achieved was 86.2% for wet furrow irrigation achieving a high grape yield (30.7 t/ha). The relation between the infiltration (cumulative depth, Z and rate, I) and opportunity time (t<sub>0</sub>) in minutes for WT and DT treatments was: Z<sub>WT</sub> = 0.528 t<sub>0</sub><sup>0.6</sup>, Z<sub>DT</sub> = 1.2 t<sub>0</sub><sup>0.501</sup>, I<sub>WT</sub> = 19 t<sub>0</sub><sup>&ndash;0.4</sup>, I<sub>DT</sub> = 36 t<sub>0</sub><sup>&ndash;0.498</sup>. Also, empirical power form equations were obtained for the measured advance and recession times along the furrow length during the irrigation stages of advance, storage, depletion, and recession.

Energy Harvesting and Storage by Water Infiltration of Eggshell Membrane

2020 ◽  
Vol 8 (3) ◽  
pp. 1901192
Author(s):  
Dan Gao ◽  
Changhong Liu ◽  
Shoushan Fan
Keyword(s):  
Energy Harvesting ◽  
Water Infiltration ◽  
Eggshell Membrane ◽  
And Storage

scholarly journals Stream recession curves and storage variability in small watersheds

2011 ◽  
Vol 15 (7) ◽  
pp. 2377-2389 ◽  
Author(s):  
N. Y. Krakauer ◽  
M. Temimi
Keyword(s):  
Land Surface ◽  
Regional Scale ◽  
Water Storage ◽  
High Flow ◽  
Water Infiltration ◽  
Low Flow ◽  
Stepwise Multiple Regression ◽  
Flow Rates ◽  
Small Watersheds ◽  
And Storage

Abstract. The pattern of streamflow recession after rain events offers clues about the relationship between watershed runoff (observable as river discharge) and water storage (not directly observable) and can help in water resource assessment and prediction. However, there have been few systematic assessments of how streamflow recession varies across flow rates and how it relates to independent assessments of terrestrial water storage. We characterized the streamflow recession pattern in 61 relatively undisturbed small watersheds (1–100 km2) across the coterminous United States with multiyear records of hourly streamflow from automated gauges. We used the North American Regional Reanalysis to help identify periods where precipitation, snowmelt, and evaporation were small compared to streamflow. The order of magnitude of the recession timescale increases from 1 day at high flow rates (~1 mm h−1) to 10 days at low flow rates (~0.01 mm h−1), leveling off at low flow rates. There is significant variability in the recession timescale at a given flow rate between basins, which correlates with climate and geomorphic variables such as the ratio of mean streamflow to precipitation and soil water infiltration capacity. Stepwise multiple regression was used to construct a six-variable predictive model that explained some 80 % of the variance in recession timescale at high flow rates and 30–50 % at low flow rates. Seasonal and interannual variability in inferred storage shows similar time evolution to regional-scale water storage variability estimated from GRACE satellite gravity data and from land surface modeling forced by observed meteorology, but is up to a factor of 10 smaller. Study of this discrepancy in the inferred storage amplitude may provide clues to the range of validity of the recession curve approach to relating runoff and storage.

scholarly journals Viability of a terrace covered with porous concrete paving blocks for coffee bean drying

2021 ◽  
Vol 12 (4) ◽  
Author(s):  
João Pedro Junqueira Gomes ◽  
Alisson Pinto Soares Ponzo ◽  
Alisson Souza de Oliveira
Keyword(s):  
Concrete Block ◽  
Water Infiltration ◽  
Coffee Bean ◽  
Drying Process ◽  
Infiltration Capacity ◽  
Porous Concrete ◽  
Earth Blocks ◽  
Physical And Chemical ◽  
The City ◽  
And Storage

The success of the coffee activity depends on the beans drying process since it influences the physical and chemical coffee quality, whose result can be good or bad quality beverages. In this sense, the type of terrace has considerable influence on the product’s final quality. Therefore, in this study, ground soil terraces and porous concrete paving blocks will be evaluated, and the experiment was conducted in the city of Cambuquira/MG. For this purpose, porous concrete and compressed earth blocks with dimensions of 50 cm x 50 cm x 10 cm were built, totaling 10 blocks of each type of terrace. The experimental design was in randomized blocks (RB), using cherry coffee, with 10 replications, with a total of 20 plots. For the evaluation of the water infiltration capacity in the porous concrete paving block, a cylinder of 30 cm in diameter was used placed in the center of the porous concrete block, and the lower edges rejoined with cement to guarantee the use of the internal area of the cylinder only. The drying process of coffee on a porous concrete paving block terrace provided better quality both in the beverage and in the reduction of the number of defects in the beans. In the city of Cambuquira, the potential for infiltration and storage of rainwater is 58.8 m³ year-1. Considering a 10-year lifespan, the construction of the porous concrete paving block terrace is economically viable concerning the ground soil terrace, providing gains of up to 15%.

An Overview of Digital Image Processing and Recognition (Invited Paper)

1982 ◽  
Vol 40 ◽  
pp. 700-702
Author(s):  
R. C. Gonzalez
Keyword(s):  
Image Processing ◽  
New York ◽  
Digital Image Processing ◽  
Digital Image ◽  
Practical Implementation ◽  
Submarine Cable ◽  
Vigorous Growth ◽  
Digitized Pictures ◽  
Processing Techniques ◽  
And Storage

Interest in digital image processing techniques dates back to the early 1920's, when digitized pictures of world news events were first transmitted by submarine cable between New York and London. Applications of digital image processing concepts, however, did not become widespread until the middle 1960's, when third-generation digital computers began to offer the speed and storage capabilities required for practical implementation of image processing algorithms. Since then, this area has experienced vigorous growth, having been a subject of interdisciplinary research in fields ranging from engineering and computer science to biology, chemistry, and medicine.

Control of Secretory Production in the Isopod Hepatopancreas

1972 ◽  
Vol 30 ◽  
pp. 166-167
Author(s):  
John W. Roberts ◽  
E. R. Witkus
Keyword(s):  
B Cells ◽  
Morphological Data ◽  
Secretory Product ◽  
Secretory Function ◽  
Secretory Material ◽  
Blind Ending ◽  
Secretory Production ◽  
Regenerative Cells ◽  
Immature Cells ◽  
And Storage

The isopod hepatopancreas, as exemplified by Oniscus ascellus. is comprised of four blind-ending diverticula. The regenerative cells at the tip of each diverticula differentiate into either club-shaped B-cells, which serve a secretory function, or into conoid S-cells, which serve in the absorption and storage of nutrients.The glandular B-cells begin producing secretory material with the development of rough endoplasmic reticulum during their process of maturation from the undifferentiated regenerative cells. Cytochemical and morphological data indicate that the hepatopancreas sequentially produces two types of secretory material within the large club-shaped cells. The production of the carbohydrate-like secretory product in immature cells seems to be phased out as the production of the osmiophilic secretion was phased in as the cell matured.

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