Simulation experimental study on the influence of plow pan on water infiltration in dry land

2021 ◽  
Vol 24 (1/2) ◽  
pp. 1
Author(s):  
Kaijian Wu ◽  
Li Zhao ◽  
Xiuyuan Lu
Keyword(s):  
Experimental Study ◽  
Water Infiltration ◽  
Dry Land

scholarly journals The Policy Implementation Impact on Region Management

2019 ◽  
Vol 8 (2S9) ◽  
pp. 649-657
Keyword(s):  
Policy Implementation ◽  
Water Conservation ◽  
Environmental Changes ◽  
Water Infiltration ◽  
Hindrance Factor ◽  
Cluster Sampling ◽  
Main Function ◽  
Management Effectiveness ◽  
Dry Land ◽  
Agricultural Plant

The land function alteration happens massively at Kecamatan Cimenyan, an area in North Bandung Region or known as Kawasan Bandung Utara (KBU). KBU areas are important because it is located traverse 4 different regions, such as Bandung, Kabupaten Bandung, Kabupaten Bandung Barat, and Cimahi. The main function KBU areas to the cities and districts are very important, especially for water infiltration. It means that these areas are become the main water conservation land and also a flooding prevention area, not only for Bandung Raya region, but also for West Java Region. Land function alteration that happen in Kecamatan Cimenyan are encompass forest, plantation, dry land agricultural plant or known as TPLK conversion and water conservation land alteration into housing development, hotel chain business, and even change into mining area. That leads to environmental changes, such as soil erosion and sedimentation, overflowing river that leads to floods. It’s all because the water conservation areas are getting smaller and smaller each day. Thus, this research aimed to analyse the policy implementation factors that affect the region management effectiveness, hindrance factor, and also the administration efforts at Kecamatan Cimenyan Kabupaten Bandung. An explanative method was used to analyse this research, and used cluster sampling to select the sample from 9 village and kelurahan in KBU region, Kecamatan Cimenyan Kabupaten Bandung in particular. And on every stage sampling are taken by simple random sampling method. The data of this research are examine using structure equation modelling (SEM), a procedure based on methods of successive interval. This research disclosed that the policy implementation that based on communication dimension, resources, disposition/support attitude and bureaucratic structure have a significant impact on the region management effectiveness. And the most significant dimension to determine the effectiveness of the region management was support/disposition dimension then followed by others dimension.

Soil Infiltration Characteristics under Different Land at Western Yunnan Plateau

2014 ◽  
Vol 884-885 ◽  
pp. 694-697 ◽  
Author(s):  
Dan Hui Qi ◽  
Zhi Qin Liu
Keyword(s):  
Land Use ◽  
Infiltration Rate ◽  
Water Infiltration ◽  
Forest Land ◽  
Dry Land ◽  
Grass Land ◽  
Yunnan Plateau ◽  
Soil Water Infiltration ◽  
Land Use Types ◽  
Western Yunnan

On the basis of soil physical properties of three different land use types at western Yunnan plateau, the soil moisture infiltration characteristics in these three land use types were studied with the advanced double-rings method. The results showed that there were differences on soil bulk density, soil porosity, initial soil water infiltration rate and stable soil water infiltration rate. The bulk density of dry land is higher than that of forest land and grass land, which results in the physical properties and structure of forest land soil are better than those of non-forest land. For the initial infiltration, its order from high to low is forest land, dry land and grass land. Among different stands, it is showed that from the average infiltration rate and steady infiltration rate, its order from high to low was forest land, grass land and dry land.

scholarly journals Experimental Study of Water Infiltration in Unsaturated Horizontal Sand Columns under Various Air Confinement Conditions

Geofluids ◽  
2019 ◽  
Vol 2019 ◽  
pp. 1-13
Author(s):  
Meng Chen ◽  
Zhifang Zhou ◽  
Brent Sleep ◽  
Xingxing Kuang ◽  
Li Mingwei ◽  
...  
Keyword(s):  
Experimental Study ◽  
Unsaturated Soils ◽  
Water Saturation ◽  
Water Pressure ◽  
Air Pressure ◽  
Pressure Effects ◽  
Water Infiltration ◽  
Water Inflow ◽  
Infiltration Process ◽  
Pressure Buildup

The process of water infiltration into initially dry sand was studied in horizontal sand columns under various airtight conditions. To investigate the interrelations among water inflow behavior, air pressure, air confinement effect, and vent effectiveness in unsaturated porous media experiencing dynamic infiltration, a total of five dynamic infiltration experiments with fixed inlet water pressure were performed with different air vents open or closed along the column length. Visualizations of the infiltration process were accompanied by measurements of water saturation, air pressure, and accumulated water inflow. In a column system with an open end, the absence of air pressure buildup reveals that the vent at the column end can significantly reduce the internal air pressure effects during infiltration, and the air phase can be ignored for this case. However, in columns with a tight end, the coupled air and water flow processes can be divided into two completely different periods. Before the water front passed by the most distant open vent, the internal air pressure effects on retarding dynamic infiltration are negligible, similar to the open end case. After this period, the open vents can certainly influence the inflow behavior by functioning as air outlets while they cannot equilibrate pore air pressure with the atmospheric pressure. The remaining air ahead of the front will be gradually confined and compressed, and the significant increase in air pressure highlights the great role of air pressure buildup in reducing the water infiltration rate. The closer the last open vent was to the water inlet, the higher was the increase in air pressure and the greater was the delaying effect on water infiltration. This work may extend the experimental study of water infiltration into the unsaturated soils with different airtight conditions and provide experimental evidence on these coupled mechanisms among the water and air phases in soils.

scholarly journals Evaluation of Infiltration Improvement and Surface Reduction Using Various Soil Conservation Techniques in Coffee Agroforestry Systems in Sumbermanjing Wetan

2022 ◽  
Vol 9 (1) ◽  
pp. 13-19
Author(s):  
Dina Ananda Harfia ◽  
Sugeng Prijono
Keyword(s):  
Surface Runoff ◽  
Soil Conservation ◽  
Soil Surface ◽  
Agroforestry Systems ◽  
Water Infiltration ◽  
Soil Infiltration ◽  
Infiltration Capacity ◽  
Dry Land ◽  
Coffee Agroforestry ◽  
Land Farming

The uneven distribution and intensity of rain cause a shortage and excess of water in dry land farming. It appears that the problem of soil conservation in principle is the regulation of the relationship between rainfall intensity, infiltration capacity, and runoff adjustment. To improve the physical properties of the soil, and the hydrological function of the land use it cannot only be stressed on the coffee plant. Other factors such as soil surface management, such as providing organic matter, covering the soil surface with understory plants, making absorption holes, terraces, waterways and so on, can improve the hydrological function of the land. Rainwater management can be carried out through controlling surface runoff, harvesting rainwater, increasing soil infiltration capacity, managing soil, controlling evaporation and seepage, lining waterways. The use of silt pit parallel is considered quite effective because it is able to produce the lowest surface runoff and sufficient water storage. Silt pit parallel can produce 0.6% of rainfall into surface runoff and also can store water as much as 62.35% of the rainfall that enters the plot. The functions of a silt pit are to increase water infiltration into the soil. On dry land, silt pit functions as a place for harvesting rainwater and surface runoff. Based on the correlation regression test, the amount of surface runoff is closely influenced by the intensity of rain or rainfall.

scholarly journals Experimental study of water infiltration on an unsaturated soil-geosynthetic system

2015 ◽  
Author(s):  
Edwin Fabián García-Aristizábal ◽  
◽  
Carlos Alberto Vega-Posada ◽  
Alba Nury Gallego-Hernández ◽  
◽  
...  
Keyword(s):  
Experimental Study ◽  
Unsaturated Soil ◽  
Water Infiltration

Experimental study on the restoration from a tilt-azimuth series for improvement in resolution

1995 ◽  
Vol 53 ◽  
pp. 636-637
Author(s):  
Norio Baba ◽  
Norihiko Ichise ◽  
Syunya Watanabe
Keyword(s):  
Experimental Study ◽  
Spherical Aberration ◽  
Incident Beam ◽  
Optical Parameters ◽  
Beam Tilting ◽  
Illumination Method ◽  
Restoration Method ◽  
Illumination Mode

The tilted beam illumination method is used to improve the resolution comparing with the axial illumination mode. Using this advantage, a restoration method of several tilted beam images covering the full azimuthal range was proposed by Saxton, and experimentally examined. To make this technique more reliable it seems that some practical problems still remain. In this report the restoration was attempted and the problems were considered. In our study, four problems were pointed out for the experiment of the restoration. (1) Accurate beam tilt adjustment to fit the incident beam to the coma-free axis for the symmetrical beam tilting over the full azimuthal range. (2) Accurate measurements of the optical parameters which are necessary to design the restoration filter. Even if the spherical aberration coefficient Cs is known with accuracy and the axial astigmatism is sufficiently compensated, at least the defocus value must be measured. (3) Accurate alignment of the tilt-azimuth series images.

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