The effect of vegetation on infiltration in shallow soils underlain by fissured bedrock

Stothoff, S.; Or, Dani; Groeneveld, David P.; Jones, Scott B.

doi:10.1016/s0022-1694(99)00038-4

Cited by 28 publications

(18 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Also, it is speculated that more moisture will be available for plant use in areas receiving runoff from upgradient outcrop areas. Previous plant survey studies of soil-covered desert bedrock have shown that plant density is correlated to water storage capacity, a function of soil grain size distribution and thickness [Stothoff et al, 1999].…”

Section: Vegetation and Soilsmentioning

confidence: 99%

Controls on the variability of net infiltration to desert sandstone

Heilweil

McKinney

Zhdanov

et al. 2007

Water Resources Research

View full text Add to dashboard Cite

[1] As populations grow in arid climates and desert bedrock aquifers are increasingly targeted for future development, understanding and quantifying the spatial variability of net infiltration becomes critically important for accurately inventorying water resources and mapping contamination vulnerability. This paper presents a conceptual model of net infiltration to desert sandstone and then develops an empirical equation for its spatial quantification at the watershed scale using linear least squares inversion methods for evaluating controlling parameters (independent variables) based on estimated net infiltration rates (dependent variables). Net infiltration rates used for this regression analysis were calculated from environmental tracers in boreholes and more than 3000 linear meters of vadose zone excavations in an upland basin in southwestern Utah underlain by Navajo sandstone. Soil coarseness, distance to upgradient outcrop, and topographic slope were shown to be the primary physical parameters controlling the spatial variability of net infiltration. Although the method should be transferable to other desert sandstone settings for determining the relative spatial distribution of net infiltration, further study is needed to evaluate the effects of other potential parameters such as slope aspect, outcrop parameters, and climate on absolute net infiltration rates.

show abstract

Section: Vegetation and Soilsmentioning

confidence: 99%

Controls on the variability of net infiltration to desert sandstone

Heilweil

McKinney

Zhdanov

et al. 2007

Water Resources Research

View full text Add to dashboard Cite

show abstract

“…Due to the dry climate, thick vadose zones, and vegetation water uptake, groundwater recharge in arid and semiarid basin floors is typically very small (Phillips, 1994;Izbicki et al, 2000;Walvoord et al, 2002;Flint et al, 2004;Walvoord and Phillips, 2004;Scanlon et al, 2005). Although vegetation functions in partitioning shallow subsurface water in two ways: (1) through root-water-uptake reducing or completely eliminating deep percolation (potential recharge), or even causing vertical groundwater discharge where the water table is shallow, and (2) through root-induced macropores facilitating deep percolation, the first mechanism seems to be dominant in arid and semiarid regions (Gee et al, 1994;Stothoff et al, 1999). With increasing soil wetness, the second mechanism may become more significant.…”

Section: Introductionmentioning

confidence: 99%

Modelling investigation of water partitioning at a semiarid ponderosa pine hillslope

Guan¹,

Šimůnek²,

Newman³

et al. 2010

Hydrological Processes

View full text Add to dashboard Cite

Abstract:The effects of vegetation root distribution on near-surface water partitioning can be two-fold. On the one hand, the roots facilitate deep percolation by root-induced macropore flow; on the other hand, they reduce the potential for deep percolation by root-water-uptake processes. Whether the roots impede or facilitate deep percolation depends on various conditions, including climate, soil, and vegetation characteristics. This paper examines the effects of root distribution on deep percolation into the underlying permeable bedrock for a given soil profile and climate condition using HYDRUS modelling. The simulations were based on previously field experiments on a semiarid ponderosa pine (Pinus ponderosa) hillslope. An equivalent single continuum model for simulating root macropore flow on hillslopes is presented, with root macropore hydraulic parameterization estimated based on observed root distribution. The sensitivity analysis results indicate that the root macropore effect dominates saturated soil water flow in low conductivity soils (K matrix below 10 7 m/s), while it is insignificant in soils with a K matrix larger than 10 5 m/s, consistent with observations in this and other studies. At the ponderosa pine site, the model with simple rootmacropore parameterization reasonably well reproduces soil moisture distribution and some major runoff events. The results indicate that the clay-rich soil layer without root-induced macropores acts as an impeding layer for potential groundwater recharge. This impeding layer results in a bedrock percolation of less than 1% of the annual precipitation. Without this impeding layer, percolation into the underlying permeable bedrock could be as much as 20% of the annual precipitation. This suggests that at a surface with low-permeability soil overlying permeable bedrock, the root penetration depth in the soil is critical condition for whether or not significant percolation occurs.

show abstract

“…Nilai r yang negatif tersebut mungkin disebabkan porositas total tanah aluvial yang bertekstur lempung berliat di daerah penelitian lebih didominasi oleh pori mikro yang tidak mendukung terhadap proses infiltrasi (Wild, 1993). Menurut Stothoff et al (1999) kapasitas infiltrasi tidak ditentukan oleh pori mikro tetapi oleh jumlah pori makro dalam tanah. Fenomena ini sesuai dengan pendapat Foth (1988) yang menyatakan bahwa tanah pasir mempunyai porositas total lebih kecil dibanding tanah liat.…”

Section: Kapasitas Infiltrasi Dan Sifat Biofisik Tanahunclassified

“…Vegetasi menjadi faktor penentu besarnya kapasitas infiltrasi, yaitu semakin banyak dan besar ukuran vegetasi kapasitas infiltrasi semakin besar (Stothoff et al, 1999). Kapasitas infiltrasi pada lahan rumput dan tegalan yang cenderung rendah disebabkan kedua vegetasi memiliki akar serabut dengan kedalaman sangat terbatas kurang mendukung terjadinya proses infiltrasi.…”

Section: Pengaruh Penggunaan Lahan Terhadap Kapasitas Infiltrasiunclassified

Pengaruh Perubahan Penggunaan Lahan terhadap Sifat Biofisik Tanah dan Kapasitas Infiltrasi di Kota Malang

Utaya

2008

For. Geo.

View full text Add to dashboard Cite

Land use management causes the changes of the function of the land in the city. (1) the number of worms is identified with monolith and hand sorting method, the SOM is identified with fraction analysis, and the porosity is identified with cylinder and pignometer method. The water absorption is measured with the plot experiment. The influence of the landuse towards soil biophysical traits is analyzed T-test and the influence of landuse change towards infiltration capacity is analyzed correlatively. This research gains the results that:

show abstract

The effect of vegetation on infiltration in shallow soils underlain by fissured bedrock

Cited by 28 publications

References 32 publications

Controls on the variability of net infiltration to desert sandstone

Controls on the variability of net infiltration to desert sandstone

Modelling investigation of water partitioning at a semiarid ponderosa pine hillslope

Pengaruh Perubahan Penggunaan Lahan terhadap Sifat Biofisik Tanah dan Kapasitas Infiltrasi di Kota Malang

Contact Info

Product

Resources

About