When any rain falls in drought-stricken North Texas, a lot of it runs off roofs and gutters and down the pavement, lost to further use. But you can learn how to catch and save that runoff -- the volume of water may surprise you. The Cross Timbers Chapter of the Native Plant Society of Texas will present a program on rainwater harvesting at its meeting Thursday in Weatherford.Homer Babbitt, a certified rainwater harvesting specialist and master gardener, will review ways to capture and use rainwater. The program will cover topics such as how much water you can collect, size and type of tanks or rain barrels, costs, methods of collection and usage. Rainwater harvesting can be done by anyone who needs extra sources of water for outdoor uses, from individual residents to farmers and ranchers.Babbitt, a Parker County resident, has given numerous presentations on rainwater harvesting as well as landscaping with native and drought-tolerant plants. He was a founding member of the Cross Timbers Chapter.The program will begin at 7 p.m. on Thursday at Cherry Park community building, 313 Davis St. A short business meeting will be held at 6:30 p.m., followed by refreshments and the educational program. The public is always welcome.The Cross Timbers Chapter promotes conservation, research and use of native plants in the rich biological region west of Fort Worth. Chapter meetings are held the second Thursday of the month. For information, go to www.npsot.org/wp/crosstimbers.