A method for controlling evaporation from a body of water including applying a water insoluble compound and a water soluble polymer including at least one polymer selected from the group consisting of (i) carbonyl polymers including at least one functional group having a carbonyl moiety and (ii) non-carbonyl polymers having a weight average molecular weight of at least 5000 to the body of water, wherein the water insoluble compound and the water soluble polymer are applied to the body of water either in admixture, where the admixture includes the water insoluble compound and the water soluble polymer in mutual association through non-covalent bonding interactions, or by applying the water insoluble compound to the body of water prior to application of the water soluble polymer, and wherein a) the water insoluble compound assembles to form a layer at the surface of the body of water and is of Formula: where A is a hydrophobic moiety in form of a saturated C 16 to C 22 alkyl chain; L is selected from the group consisting of a bond, O, NR, S, COO, OCO, COS, SCO, S=O, SO 2, O 2 P(=O) NRCO, CONR, O(C=O)NR, NR(C=O)O and NR(C=O)NR; D is an alkylene including at least one carbon atom; E is selected from the group consisting of a bond, O, NR 1, S, COO, OCO, COS, SCO, S=O, SO 2, O 2 P(=O), NR 1 CO, CONR 1, O(C=O)NR 1, NR 1 (C=O)O and NR 1 (C=O)NR 1; R at each occurrence is independently selected from the group consisting of H, C 1 to C 4 alkyl and the group -(D-E) m -B; R 1 is selected from the group consisting of H and C 1 to C 4 alkyl; B is selected from the group consisting of hydrogen, C 1 to C 4 alkyl and a hydrophilic moiety including at least one hydrophilic functional group; and m is 0, 1, 2, 3 or 4 b) the water soluble polymer is adapted to interact with the water insoluble compound by non-covalent bonding interactions, and wherein the water soluble polymer includes less than 10% (w/w) of water soluble ionized polymers. a) the water insoluble compound assembles to form a layer at the surface of the body of water and is of Formula: where A is a hydrophobic moiety in form of a saturated C 16 to C 22 alkyl chain; L is selected from the group consisting of a bond, O, NR, S, COO, OCO, COS, SCO, S=O, SO 2, O 2 P(=O) NRCO, CONR, O(C=O)NR, NR(C=O)O and NR(C=O)NR; D is an alkylene including at least one carbon atom; E is selected from the group consisting of a bond, O, NR 1, S, COO, OCO, COS, SCO, S=O, SO 2, O 2 P(=O), NR 1 CO, CONR 1, O(C=O)NR 1, NR 1 (C=O)O and NR 1 (C=O)NR 1; R at each occurrence is independently selected from the group consisting of H, C 1 to C 4 alkyl and the group -(D-E) m -B; R 1 is selected from the group consisting of H and C 1 to C 4 alkyl; B is selected from the group consisting of hydrogen, C 1 to C 4 alkyl and a hydrophilic moiety including at least one hydrophilic functional group; and m is 0, 1, 2, 3 or 4 A is a hydrophobic moiety in form of a saturated C 16 to C 22 alkyl chain; L is selected from the group consisting of a bond, O, NR, S, COO, OCO, COS, SCO, S=O, SO 2, O 2 P(=O) NRCO, CONR, O(C=O)NR, NR(C=O)O and NR(C=O)NR; D is an alkylene including at least one carbon atom; E is selected from the group consisting of a bond, O, NR 1, S, COO, OCO, COS, SCO, S=O, SO 2, O 2 P(=O), NR 1 CO, CONR 1, O(C=O)NR 1, NR 1 (C=O)O and NR 1 (C=O)NR 1; R at each occurrence is independently selected from the group consisting of H, C 1 to C 4 alkyl and the group -(D-E) m -B; R 1 is selected from the group consisting of H and C 1 to C 4 alkyl; B is selected from the group consisting of hydrogen, C 1 to C 4 alkyl and a hydrophilic moiety including at least one hydrophilic functional group; and m is 0, 1, 2, 3 or 4 b) the water soluble polymer is adapted to interact with the water insoluble compound by non-covalent bonding interactions, and wherein the water soluble polymer includes less than 10% (w/w) of water soluble ionized polymers. wherein the water soluble polymer includes less than 10% (w/w) of water soluble ionized polymers.