The reservoirs are tight sand, with an average porosity of 4. 74% and permeability of 0. 417×10-3 μm2. Delta front underwater distributary channel and mouth bar are the favorable reservoir micro-facies.
The sand body of the Yang-61-2 oil layer in Y oil field is accurately identified in its configuration, the river channel is considered the best exploration and exploitation area for oil-gas pools in the Ordos basin.
The braided river channel and underwater distributary channel microfacies are favorable sedimentary facies belts in the Block and the geometry and distribution of reservoir sandbodies are controlled by the direction and extended distance of channels.
Once more,there were two major fluvial aggradation events at 9 050~8 110 and 6 700~6 240 cal. aBP when the lake contracted and the river course occupied the location of the lake basin.
Tiantai landslide which is 1.2 km2 in acreage,2 500×104 m3 in all cubage,has 210×104 m3 accumulations in river way and belongs to especial-huge and retrograde style rock landslide,is a national geological disaster which has been induced by huge rainstorm in 300 years and is an oversize landslide disaster which scope and possession losing is the largest at the red stratum in Sichuan basin.
The types of groundwater included: (1) these were mainly HCO 3 SO 4-Na、Cl·SO 4-Na·Ca、HCO 3·Cl-Na·Ca and SO 4·Cl-Na away from the riverway –a-a’ section, respectively, but the HCO 3·SO 4-Na is the main type on b-b’.
There were not any engineering measures of blocking slag and steady slag in 74.97% slagheaps. The waste stone heaps occupied riverway were about 86.37%. The stability was bad and the baddest in 71% waste stone heaps.
The geometric similitude, kinematic similitude and kinetic similitudebetween the lab model and the prototype for sedimentation simulation form the basis of three similitude principles, while three similitude rules, i.e., the suspension similitude rule, the particle movement similitude rule and the riverway distortion similitude rule can be deduced from the three similitude principles, and thee principles and rules are the basic theories for the development of physical simulation about the clastic sedimentation processes.
Aliasing error bounds are derived for one- and two-channel sampling series analogous to the Whittaker-Kotel'nikov-Shannon series, and for the multi-band sampling series, and a "derivative" extension of it, due to Dodson, Beaty, et al.
Guanidine-type compounds that reached clinical status include amongst others the potassium channel opener, pinacidil and the histamine H2-receptor antagonists (e.g.
Their cross sectional distribution patterns in relation to the river channel morphologies were examined by using ship-mounted ADCP (Acoustic Doppler Current Profiler) instrument.
The influence of the water level in the period of the open river channel and the duration of lower floodplain inundation on the feeding conditions, abundance, and population state of coregonids in the Lower Ob was investigated.
It is shown that the radionuclide distribution across the floodplain and along the river flow is determined by the formation of a barrier to their migration near the river channel, at which less mobile 137Cs accumulates.
Consequently division of grids and numerical calculation of water quality with finite clement method can be carried out on the basis of available method and topographic map of the river course.
The minimal values in active channel and maximal in the near-bank zone are typical for those channel sections where heavy metals, present in a solid state, are transported as a suspended load (normally the largest part of a polluted river course).
Palar River Basin, a crystalline rock region in North Arcot District (Tamil Nadu), India, possesses vast groundwater potential along and near the river course and its lands are fertile.
We found that overall species diversity increased in the Riverway, but remained constant in reference areas, although the relative increase in housing density in the two areas did not differ.
On the whole, our study provides preliminary evidence that aesthetic landscape planning, such as employed in the Lower Wisconsin State Riverway, might constitute a politically viable approach to conserve ecological resources.
A conceptual water balance methodology was used for evaluating groundwater movement among riverway, irrigation ditches, irrigation area and non-irrigation area, based on the recorded water diversion.
河道
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