Food garden capacity and population growth : a case in Papua New Guinea
Agricultural practice ; Carryingcapacity ; Farming system ; Papua New Guinea ; Resource management ; Rural community ; Subsistence agriculture ; Village
Based on experiments in 2 flumes with fixed and mobile plane beds and previously published data, an equation is developed that may be used to predict bedload transport resistance for both capacity and non-capacity flows. The variables
Modelling soil erosion requires an equation for predicting the sediment transport capacity by interrill overland flow on rough surfaces. This study therefore explores the possibility that inasmuch as surface roughness affects flow hydraulic
variables which, in turn, determine transport capacity, there may be one or more hydraulic variables which capture the effect of surface roughness on transport capacity sufficiently well for good predictions of transport capacity to be achieved from data
Carryingcapacity ; Denmark ; Earth surface processes ; Fluvial processes ; Jylland ; River bed ; Sediment transport ; Sedimentary structure
A case study has been carried out in the Danish river Gels Å in a bend with equilibrium point bar topography. The purpose is to map primary and secondary bedforms and bedform migration in a meander, and to measure the actual rate of the lateral
For each of fourteen types of rangelands the vegetation and its carryingcapacity for livestock are outlined| limitations such as alternate use for crop growing, flooding and the risk of tsetse fly are discussed. From these studies it seems that 2
million cattle are at present on land that should carry only 1.2 million, making de-stocking necessary. (EMS).
The yugoslav waterways are 2.209 km long| of them 1.732 km, i. e. about 80 %, have been made navigable for craft with a maximum carryingcapacity of 1.500 tonnes. Shipyards, volume and structure of production and services, market.
This study examines how the sediment transport capacity of interrill overland flow varies with stone cover and stone size at 2 flow intensities. 6 series of flume experiments were conducted on 2 slopes with stones of 3 sizes serving as roughness
Agricultural practice ; Carryingcapacity ; Cultivated land ; Microrelief ; Rainfall simulation ; Rill wash ; Senegal ; Slope gradient ; Soil erosion ; Spatial distribution ; Splash ; Suspended load ; Water erosion
This paper presents a rainfall simulation experiment carried out on three 50 m2 plots in the Senegalese groundnut belt. The results indicate that the carryingcapacity of the runoff at the scale of 10 m2, on gentle slopes ploughed perpendicular
to the slope, could not be directly calculable from the discharge. It could depend on the history of past discharges because the shape of the flow paths, which condition their carryingcapacity, permanently interacts with the discharge. These interactions could
Belgium ; Carryingcapacity ; Catchment area;Watershed ; Channel geometry ; Land use ; Model ; Rill wash;Runoff ; Soil erosion
to rilled catchments. Furthermore, it allows the calculation of unit stream power, which has been shown to be related to the transporting capacity of overland fow, in terms of slope and discharge.
. The theoretical results obtained here demonstrate that maximum flow efficiency (MFE) determines stable alluvial channel geometry and that this is a product of both maximum sediment transporting capacity (MSTC) and minimum stream power (MSP). Furthermore
(BMF) approach using equations of Engelund and Hansen, Ackers and White, Yang, and Karim's modified BMF method; and the transport capacity fraction (TCF) approach. Statistical analysis and graphical comparison are utilized to demonstrate the performance
in volcanically disturbed rivers reflects higher transport capacities than in their nondisturbed counterparts, and that arid zone channels provide a better analog for predicting post-eruption bedload transport due to their high transport efficiency.
Carryingcapacity ; Grain size distribution ; Loam ; Rill wash ; Sediment transport ; Soil erosion ; Water erosion
The objectives of this study were to determine whether sediment transport capacity is a unique value for given soil, flow rate, and slope, and to determine if equilibrium sediment concentration in the rill obtained by detachment was different from
and bedload transport formulae. This study provides support for the use of the criteria of MFE, maximum sediment transporting capacity and minimum stream power for understanding the operation of alluvial rivers, and also addresses limitations to the direct
Carryingcapacity ; China ; Fluvial hydrology ; Huang He ; Hydraulic works ; Sediment budget ; Sediment transport ; Sedimentation ; Stream ; Watershed
and development of the drainage basin, etc., were carried out. Moreover, this project has outstanding features comparing with other researches on the large rivers in China.
The aim of this paper is to analyse the calibration of the piezoelectric bedload impact sensor (PBIS) system with the detailed sediment observations carried out in 1994 and 1995 in the Pitzbach mountain stream in Austria. They discuss these results
Carryingcapacity ; Channel geometry ; Experimentation ; Random process ; Stream
Flume experiments were carried out to investigate the motion of large woody debris (LWD) in rivers as influenced by the presence of obstacles. Non-rooted, defoliated LWD was modelled by placing properly scaled wooden dowels placed into controlled