scholarly journals Increase and Spatial Variation in Soil Infiltration Rates Associated with Fibrous and Tap Tree Roots

Water ◽  
2019 ◽  
Vol 11 (8) ◽  
pp. 1700 ◽  
Author(s):  
Dashuai Zhang ◽  
Zhaogeng Wang ◽  
Qizhong Guo ◽  
Jijian Lian ◽  
Liang Chen
Keyword(s):  
Lateral Roots ◽  
Infiltration Rate ◽  
Urban Environments ◽  
Soil Infiltration ◽  
Tree Roots ◽  
Sophora Japonica ◽  
Urban Stormwater Management ◽  
Infiltration Rates ◽  
Malus Baccata ◽  
Fibrous Roots

Trees play important roles in urban stormwater management; through the loosening of soils by root growth, they increase infiltration and reduce runoff, helping to mitigate flooding and recharge groundwater. Malus baccata with fibrous roots and Sophora japonica with tap roots were studied experimentally to assess their enhancement of soil infiltration. A blank test without a tree was conducted for comparison. Steady-state soil infiltration rates at the bottom of test tanks were measured as 0.28 m/d, 0.33 m/d, and 0.61 m/d for the blank test, M. baccata, and S. japonica, respectively. This represents a 19% increase in the infiltration rate by planting M. baccata and a 118% increase by planting S. japonica. A larger increase in the infiltration rate by S. japonica is consistent with the effects of deeper and more vertical roots that help loosen deeper soils. Spatial variations in soil infiltration rates were also measured. Infiltration rates for M. baccata (1.06 m/d and 0.62 m/d) were larger than those for S. japonica (0.91 m/d and 0.51 m/d) at the same depths (0.35 m and 0.70 m); this is consistent with the expected effects of the shallower and more lateral roots of M. baccata. This study furthers our understanding of the roles of trees in watersheds and urban environments.

Assessment of variability of soil Infiltration Characteristics in Forage Cover

2020 ◽  
Vol 7 (03) ◽  
Author(s):  
AKRAM AHMED ◽  
A. K. PAL ◽  
V. K. PANDEY ◽  
MAHENDRA PRASAD ◽  
ASHUTOSH UPADHYAYA
Keyword(s):  
Steady State ◽  
Sandy Loam ◽  
Infiltration Rate ◽  
Panicum Maximum ◽  
Soil Infiltration ◽  
Infiltration Rates ◽  
Bare Land ◽  
Physically Based ◽  
Loam Soil ◽  
Horton Model

In India, very limited knowledge of soil infiltration characteristics in forages are available. In this study, infiltration characteristics of land covered by six forages have been studied with respect to bare land in sandy loam soil. Two empirical (Kostiakov and Horton) and two physically-based (Phillip and Green‒Ampt) models have been employed to estimate infiltration characteristics and compared with observed field infiltration data. The steady-state infiltration rates measured in forages and bare land were significantly (p less than 0.05) different. The highest average steady-state infiltration rate was measured in Panicum maximum (9.00 cm h-1) followed by TSH (7.40 cm h-1) and least was recorded in Cenchrus ciliaris (2.65 cm h-1) whereas the average steady-state infiltration rate recorded for bare land was 1.90 cm h-1. Results showed that the Kostiakov and Phillip model simulated the field infiltration characteristics with higher accuracy than the two other models except for Chrysopogonfulvus and bare land in which the Horton model outperformed other models. Higher steady-state infiltration rates in forages were attributed to more porosity measured in the soils under forages as compared to bare land.

scholarly journals Determining Variability in Characteristics of Residential Landscape Soils that Influences Infiltration Rates

2013 ◽  
Vol 39 (6) ◽  
Author(s):  
Brian Pearson ◽  
Richard Beeson ◽  
Carrie Reinhart-Adams ◽  
Michael Olexa ◽  
Amy Shober
Keyword(s):  
Surface Water ◽  
Soil Compaction ◽  
Water Contamination ◽  
Infiltration Rate ◽  
Root Penetration ◽  
Moisture Retention ◽  
Soil Infiltration ◽  
Surface Water Contamination ◽  
Infiltration Rates ◽  
Residential Communities

Although composed mostly of sand, observations of new urban residential communities in Florida suggested relatively wide ranges in clay content and importation of offsite soils. Often these communities are constructed around surface water where heavy summer rains and intense landscape maintenance present concerns for surface water contamination. Due to land sculpturing, soil compaction and importation; onsite soil physical properties may differ from soil maps developed decades before. How much change and what changes occurred has seldom been quantified. This study examined soil characteristic data from diverse, newly constructed urban soils and examined relationships with soil infiltration rates. Samples were collected from 40 lots in nine newly established urban residential communities within Central Florida to quantify textural composition, bulk density (Db), moisture retention, and pore size distribution. Most lots (90%) contained sandy soil dominated by micropores (58% total mean pore space). Variability of Db was low with most communities exhibiting high soil compaction (>1.7 g cm-3), which may indicate potential plant root penetration concerns. Mean soil infiltration rates among communities were high (11 to 64 cm hr-1), with large variations (2.0 to 111.1 cm hr-1). Correlations between soil moisture retention volumes, Db, and infiltration rate did not occur. However, soil texture was a significant predictor of infiltration rate. Relationships between infiltration rates and soil characteristics were poor (r2 = 0.43) and suggest direct measurement of infiltration rate may be necessary. High infiltration rates, despite compaction, indicate reduced potential for surface water contamination if a sufficient natural fetch separates landscapes from water bodies.

scholarly journals Comparing infiltration rates in soils managed with conventional and alternative farming methods: a meta-analysis

2019 ◽  
Author(s):  
Andrea D. Basche ◽  
Marcia S. DeLonge
Keyword(s):  
Crop Rotation ◽  
Cover Crops ◽  
Rainfall Variability ◽  
Meta Analysis ◽  
Agricultural Practices ◽  
Infiltration Rate ◽  
Soil Infiltration ◽  
Infiltration Rates ◽  
No Till ◽  
Water Cycling

AbstractIdentifying agricultural practices that enhance water cycling is critical, particularly with increased rainfall variability and greater risks of droughts and floods. Soil infiltration rates offer useful insights to water cycling in farming systems because they affect both yields (through soil water availability) and other ecosystem outcomes (such as pollution and flooding from runoff). For example, conventional agricultural practices that leave soils bare and vulnerable to degradation are believed to limit the capacity of soils to quickly absorb and retain water needed for crop growth. Further, it is widely assumed that farming methods such as no-till and cover crops can improve infiltration rates. Despite interest in the impacts of agricultural practices on infiltration rates, this effect has not been systematically quantified across a range of practices. To evaluate how conventional practices affect infiltration rates relative to select alternative practices (no-till, cover crops, crop rotation, introducing perennials, crop and livestock systems), we performed a meta-analysis that included 89 studies with field trials comparing at least one such alternative practice to conventional management. We found that introducing perennials (grasses, agroforestry, managed forestry) or cover crops led to the largest increases in infiltration rates (mean responses of 59.2 ± 20.9% and 34.8 ± 7.7%, respectively). Also, although the overall effect of no-till was non-significant (5.7 ± 9.7%), the practice led to increases in wetter climates and when combined with residue retention. The effect of crop rotation on infiltration rate was non-significant (18.5 ± 13.2%), and studies evaluating impacts of grazing on croplands indicated that this practice reduced infiltration rates (−21.3 ± 14.9%). Findings suggest that practices promoting ground cover and continuous roots, both of which improve soil structure, were most effective at increasing infiltration rates.

The Experiment Study on the Soil Infiltration Characteristics of Yumenkou Water Pumping Station Irrigation District of Regional Scale

2013 ◽  
Vol 316-317 ◽  
pp. 661-664 ◽  
Author(s):  
Lin Hu Yuan ◽  
Gui Sheng Fan
Keyword(s):  
Soil Structure ◽  
Soil Moisture Content ◽  
Regional Scale ◽  
Infiltration Rate ◽  
Irrigation District ◽  
Shanxi Province ◽  
Soil Infiltration ◽  
Volume Weight ◽  
Water Pumping ◽  
Weight Content

This paper is based on an item of key problem of agriculture of Shanxi province through field test and indoor test. Capability of soil infiltration and soil moisture content,soil volume-weight,content of soil organic matter,soil structure were measured.Infiltration content and infiltration rate reflect the capability of soil infiltration. Ten points of Yumenkou irriqated area located in Hejin, Jishan,Xinjiang were choosed,which can represent the soil feature of this area very well.The study of soil infiltration will give the scientific reason for the rational determining of field irrigation technique parameter.

scholarly journals Karakteristik Tanah Longsor di Daerah Aliran Sungai Tangka

2018 ◽  
pp. 203 ◽  
Author(s):  
Usman Arsyad ◽  
Roland Alexander Barkey ◽  
Wahyuni Wahyuni ◽  
Karla Kembongallo Matandung
Keyword(s):  
Infiltration Rate ◽  
Ground Movement ◽  
Soil Infiltration ◽  
Local Conditions ◽  
Soil Weathering ◽  
Sparse Vegetation ◽  
Open Land ◽  
Landslide Slope ◽  
Steep Slopes

Landslides occur as a result of ground movement on steep slopes, and the high humidity (moisture), and the sparse vegetation (open land). The Local conditions is an interrelated components. The process of landslides can be explained that the water soak into the soil will add weight to the ground. If the water penetrates the soil acts as a watertight sliding plane, the ground becomes slippery and soil weathering on it will move to follow the slope. This study aims to determine the type of landslide, landslide characteristics and landslides causing factors. This research was conducted in September 2015 in Watershed Tangka. The study consisted of three stages, namely the determination of the coordinates of the location of the landslide, landslide determining the location of the sample, the determination of the type of landslide, slope measurements, measurements of the dimensions of landslide and infiltration. Research results obtained are the coordinates of the location of as many as 17 points landslide, landslide types of translation and rotation, land cover and soil texture. There is no difference in the type of soil, infiltration rate, vegetation, geologi, slope and rainfall in both types of landslide are found. 

scholarly journals Spatial and Temporal Evolution of the Infiltration Characteristics of a Loess Landslide

2020 ◽  
Vol 9 (1) ◽  
pp. 26 ◽  
Author(s):  
Dongdong Yang ◽  
Haijun Qiu ◽  
Yanqian Pei ◽  
Sheng Hu ◽  
Shuyue Ma ◽  
...  
Keyword(s):  
Slope Stability ◽  
Slope Failure ◽  
Temporal Evolution ◽  
Infiltration Rate ◽  
Middle Part ◽  
Loess Landslide ◽  
Infiltration Rates ◽  
Disturbed Soil ◽  
Landslide Body ◽  
Over Time

Infiltration plays an important role in influencing slope stability. However, the influences of slope failure on infiltration and the evolution of infiltration over time and space remain unclear. We studied and compared the infiltration rates in undisturbed loess and disturbed loess in different years and at different sites on loess landslide bodies. The results showed that the average initial infiltration rate in a new landslide body (triggered on 11 October 2017) were dramatically higher than those in a previous landslide body (triggered on 17 September 2011) and that the infiltration rates of both landslide types were higher than the rate of undisturbed loess. The initial infiltration rate in the new landslide body sharply decreased over the 4–5 months following the landslide because of the appearance of physical crusts. Our observations indicated that the infiltration rate of the disturbed soil in a landslide evolved over time and that the infiltration rate gradually approached that of undisturbed loess. Furthermore, in the undisturbed loess, both the initial and quasi-steady infiltration rates were slightly higher in the loess than in the paleosol, and in the previous landslide body, the infiltration rate was highest in the upper part, intermediate in the middle part, and lowest in the lower part. This study can help us to better understand the evolution process of infiltration in undisturbed loess, previous landslides, and new landslides.

scholarly journals Non-potable Water Quality Assessment Methodology for Water Conservation in Arid Climates

2020 ◽  
Vol 5 (3-4) ◽  
pp. 215-234
Author(s):  
Geraldine Seguela ◽  
J. R. Littlewood ◽  
G. Karani
Keyword(s):  
Quality Assessment ◽  
Water Conservation ◽  
Potable Water ◽  
Salt Content ◽  
Infiltration Rate ◽  
Medical Facility ◽  
Assessment Methodology ◽  
Soil Infiltration ◽  
The Impact ◽  
Soil Infiltration Rate

Abstract This paper documents a non-potable water (NPW) quality assessment methodology for a decentralized non-potable water system in Abu Dhabi (AD), capital city of the United Arab Emirates (UAE), which is dominated by sandy and salty soil, high temperature, and humidity. The context is a medical facility case study (MFCS) in AD, which includes a landscape 50% as large as its building footprint. The project identified the need to investigate the impact of air handling unit (AHU) air conditioning (A/C) condensate water (CW) quality on soil health and building hydraulic systems. The aim of the research was to measure the impact of using recycled on-site NPW sources in a MFCS in AD, to alleviate the use of desalinated potable water and reduce associated energy consumption, operation cost, and greenhouse gas emissions for landscape irrigation (LI) and water feature (WF) use. CW has been tested in 2016 and in 2017 and analysed against local authority’s parameter limits to establish suitability for LI and WF use. The findings are that in AD CW classification and characterization is a gap in knowledge whereby salinity and toxicity concentration limits should be addressed by the local authority because CW has an impact on soil infiltration rate due its low dissolved salt content as evidenced by the water test results. The recommendations for this paper are to develop a sustainable water conservation and reuse (SWC) strategy forming the basis for a water protocol by the competent authority for regional medical facility including a methodology for assessing on-site NPW quality for outdoor reuse to reduce soil infiltration problems and consequently conserve water and associated energy. The next steps are to confirm if the MFCS soil infiltration rate is affected by the CW or other factors, and to test additional NPW types.

Effects of skidding on forest soil infiltration in west-central Alberta

2000 ◽  
Vol 80 (4) ◽  
pp. 617-624 ◽  
Author(s):  
A. D. Startsev ◽  
D. H. McNabb
Keyword(s):  
Hydraulic Conductivity ◽  
Boreal Forests ◽  
Soil Water Potential ◽  
Infiltration Rate ◽  
Forest Harvesting ◽  
Saturated Hydraulic Conductivity ◽  
Soil Freezing ◽  
Surface Erosion ◽  
Soil Infiltration ◽  
Constant Head

Soil compaction during forest harvesting generally reduces macropore space, which reduces infiltration and increases the potential for surface erosion and waterlogging. Hydrological effects of 3, 7 and 12 skidding cycles and their persistence were evaluated for 3 yr at 14 sites, which represented a range of soil texture and compaction conditions in the foothills and boreal forests of Alberta. Saturated hydraulic conductivity (HC) was determined using a constant head method on soil cores collected from 5- and 10-cm depths; unconfined infiltration rate of the surface soil (IR) was measured in situ with tension infiltrometers at near saturation. A significant (P < 0.05) increase in bulk density during skidding caused a significant reduction in both HC and IR after the first three cycles at eight sites where soil water potential at the time of skidding was higher than −15 kPa; the decrease at the other sites was not significant. Additional traffic, up to 12 cycles, did not cause a further significant decrease in HC or IR. The infiltration rate of soil compacted by three skidding cycles showed a recovery trend. However, in more intensively trafficked soils, compaction effects on infiltration remained significant for at least 3 yr, which was possibly attributed to heavy snowpacks preventing soil freezing at lower depths. Key words: Saturated hydraulic conductivity, unconfined infiltration rate, tension infiltrometers, skidders, boreal forest, Alberta

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