Abstract: A system for use with a water storage facility having a water body and an extraction structure, comprising a water selection apparatus interposed between the water body and the extraction structure. A controllable inlet allows water from a selectable depth within the water body to be harvested for withdrawal through the extraction structure, controlled according to detected differences in the water quality characteristics as between different depths. A barrier structure forms a partitioned volume allowing water from a select depth to be separated and isolated within the water body. Water at variable depths can be dynamically separated and isolated based on water quality criteria and/or characteristics, and potentially changing criteria. This may facilitate treatment and/or conditioning of the separated and isolated water prior to being extracted through a harvesting structure having fixed-elevation extraction point(s).

Abstract: The present invention relates to polymer beads comprising a polymeric matrix and having a pitted surface, the polymeric matrix (i) comprising polymerized monomer residues of (a) at least one mono-ethylenically unsaturated monomer, and (b) at least one crosslinking monomer having at least two ethylenically unsaturated groups separated by at least 4 consecutive acyclic atoms, and (ii) having distributed therethrough solid particulate material and polymeric porogen.