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The stream flow is a combination of the seasonal recharge and discharge from the groundwater <br />• system into the streams (baseflow). Figure 2-4 shows the measured discharge on Black Sulphur <br />Creek over two years. Data were not available for Rvan Gulch. The data show that flow rates <br />and general salinity (Specific Conductivity) are fairly constant throughout the year. reflecting the <br />source of the stream from Figure Four Spring (USGS. 1981 ). <br />F love <br />ft? sic <br />• <br />• <br />?S <br />,0 w <br /> l <br />o <br /> <br />15 <br />10 <br />• <br />5 <br />Black Sulphur Creek <br />A fib <br />i ??` ?iY?1i?? ? 1 <br />,1000 <br />1800 <br />1600 <br />1400 <br />1200 <br />1000 SC <br />800 <br />600 <br />400 <br />200 <br />I <br />1 6'75 7/2 5, 75 2 i 1076 X128 76 3116 -? 7 10 2 77 4 -10,78 <br />date <br />Figure 2-4. ['lot o/ /Imv i-tile (blue thumou(ls) crud Specific C'ouchrctcutce (pink squm-es) o/'Blcrck <br />Sulphur ('reek. Dotu from USGS itebsite. <br />14