Assessing soil erosion in a terraced paddy field using experimental measurements and universal soil loss equation
Agricultural practice ; Agropedology ; Cultivated land ; Experiment plot ; Rice ; Soil erosion ; Taiwan ; Terrace cultivation ; Water erosion
On an experimental site in Hsinchu county, Northern Taiwan, a terraced rice field was used to investigate the soil erosion under the regular cultivation of rice in 2005, fallow in 2006, and planting with green manure in 2007. The results show
that infiltration rates significantly increase when a terraced paddy field is under fallow or is planted with green manure; the paddy is more vulnerable to embankment collapse and increased the rates of soil erosion. The comparison revealed that soil conservation
using rice-planted terraced paddy was more effective than that resulting from other uses. The government should formulate effective measures and maintain sustainable rice planting in the terraced paddies.
The AA. studied Pleistocene climate changes recorded in soils that formed over a series of marine terraces near Tongoy about 60 km south of La Serena in the Norte Chico region. The calcrete and soil development took place on 4 marine terraces
Quantitative study on influences of terraced field construction and check-dam siltation on soil erosion
China ; Dam ; Erodibility ; Gully erosion ; Human impact ; Hydraulic works ; Loess ; Model ; Plateau ; Quantitative analysis ; Shaanxi ; Slope gradient ; Soil erosion ; Soil properties ; Soil water ; Terrace cultivation ; Watershed
To study the influences of terraced field construction and check-dam siltation on soil erosion of a watershed, the AA. built a simplified watershed model for the Loess Plateau hilly-gully region including terraced fields, slope farmlands, steep
with the increase in terraced field area percentage, while the soil erosion modulus below the edge of gully exhibited a linear decline along with the increase in siltation heigh.
Rizzuto, in deposits that had been independently assigned to MIS 5.5, and two specimens from the Capo Colonna terrace, which is thought to correlate with MIS 5.3 or 5.1. The Crotone peninsula, therefore, represents one of the few localities in Italy where
Aeolian deposit ; C 14 dating ; Central Asia ; Fluvial terrace ; Holocene ; Moisture ; Mongolia ; Optically stimulated luminescence ; Palaeo-environment ; Palaeoclimate ; Palaeosol
Geomorphological and sedimentological investigations in the lower reaches of the Orkhon River in northern Mongolia provide evidence for Late Pleistocene terraces, Holocene soil development, aeolian accumulation, soil erosion and slope wash
fluvial incision during the Quaternary, punctuated by major climatically driven periods of aggradation and dissection, which created a suite of 5 river terraces. The river terrace sequence was radically modified in the late Pleistocene by a major river
This region, drained by major river system, represents an ideal environment for fluvial fan and terrace formation. On the basis of analysis of Quaternary landforms the faults that were active during the Late Pleistocene-Holocene were identified
. Imprints of active tectonics on the landforms are discernible in the form of tilted fans, colluvial deposits and terraces, truncation of toe of fan, linear fault scarps and thrusting of Siwalik rocks over the colluvial deposits. OSL dates for fans
and terrace deposits indicate tectonic activities between 8 and 56 ka. It is showed that geomorphic evidence, chronology of depositional landforms, deformation of Quaternary landforms and soft-sediment deformation structures provide baseline information about
In this paper, author would like to provide refined relative chronological data to loess-paleosol section situated on the IV. and V. terraces of Red Hill (Moravia, Czech Republic), based on a comparison with Heinrich events, North and South
In the Caldera coastal district of Northern Chile, the marine terraces of Quaternary age are characterized by steep cliffs dissected by deep gullies, from which torrential streams are formed. The gullies are controlled by the scarps of the terraces
Climatic change ; Climatic variability ; Colorado ; Deglaciation ; Fluvial processes ; Fluvial terrace ; Palaeo-environment ; Postglacial ; Sedimentation ; United States of America
The AA. examine the natural range of variability in the Conejos River Valley, southern Colorado, through documentation of terrace morphostratigraphic and sedimentological characteristics as well as through investigation of sediment contributions
to identify Sicilian MTLs was modified by experiences developed on the mainland, with entries such as: bocage/semi-bocage, coltura promiscua, Mediterranean open field, mountain landscape, huerta and terrace landscape. Using different spatialised data layers
, including those concerned with the main historical processes of land use and land use change, a total of eight MTLs have been detected, mapped, and concisely described. The distribution and importance of terracing systems within the different MTLs
represented by the top of marsh and fluvial terraces indicate lower values for the sea level estimation compared with the data set previously proposed for the area. This stigmatizes the fact that field-oriented works are still the priority in the Patagonia
valleys and flights of marine terraces. The low-relief Sila upland surface is the remnants of a pre-uplifted landscape developed during a long time of stable base level. This study examines the tectonic geomorphology of an area extending from the northern
a chronology of sediment evacuation from the valley and deposition in the outlet fan, based on infrared stimulated luminescence (IRSL) and 14C dating of river terraces and fan strata, respectively. The effects of paraglacial sedimentation in Chilliwack Valley
terraces, vertical down-cutting of the rivers, deep gorges of rivers, triangular facets (flatirons) and tilting of beds, have been noticed in various parts of the study area. In some basins the morphometric parameters suggest a possibility of flash floods
Perennial frost mounds are present near the edges of ponds located on the terrace between the mountain flank and a valley-bottom lake in the Akkol valley. The AA. describe one mound, identified as a lithalsa, which had been eroded so as to expose