Related by context. Frequent words. (Click for all words.) 63 recharge groundwater 57 recharge aquifers 54 biofiltration 54 nonpoint source 53 Drip irrigation 53 streambanks 51 riparian forest 51 aquifer recharge 50 Odd numbered addresses 50 groundwater aquifer 50 irrigating crops 50 Reverse osmosis 50 impermeable surfaces 50 riparian habitats 50 phosphorus runoff 49 Calpine generates 49 salination 49 methane CH4 49 permeable paving 49 Stormwater runoff 49 deplete oxygen 49 Drought tolerant 49 Soil erosion 48 soil erosion 48 groundwater depletion 48 bioretention 48 irrigational 48 highly erodible 48 backwashing 48 Potable water 48 irrigated farmland 48 rainwater runoff 48 riparian zones 48 Nitrogen fertilizer 48 water 48 riversides 48 riparian vegetation 48 compare FindStuff comprehensive 48 Nitrogen oxides 48 polluted runoff 48 leafless charred trunks 47 Indus basin 47 fertilizers herbicides 47 By JOANN LIVINGSTON 47 nutrient runoff 47 riverways 47 collects rainwater 47 marine phytoplankton 47 absorbs carbon dioxide 47 brackish groundwater 47 groundwater aquifers 47 By Janice Gregorson 47 irrigated lands 47 drought tolerant landscaping 47 Ogallala aquifer 47 groundwater recharge 47 permeable pavers 47 irrigated agriculture 46 streambank 46 potability 46 xeric 46 Leachate 46 Portneuf River 46 shelterbelts 46 salinization 46 corrosive fluids 46 ponded 46 bioswales 46 hydrologic cycle 46 potent greenhouse gas 46 irrigates 46 groundwater basins 46 gallon cistern 46 Rainwater harvesting 46 forests grasslands 46 replenishable 46 irrigated cropland 46 nourish starved bodies 46 distributed unevenly 46 Coal gasification 45 naturally occurring arsenic 45 irrigation 45 minimum tillage 45 Septic tanks 45 Mosquitoes breed 45 Entire forests 45 herbicides pesticides 45 rainwater 45 rainfed areas 45 vermi compost 45 Komiske 45 wetland vegetation 45 woody vegetation 45 inflowing 45 periodic droughts 45 Irrigating 45 nonrenewable resource 45 carbon sequestering 45 riparian buffers 45 Huaihe 45 climatic variations