{"id":312,"date":"2026-05-27T11:09:43","date_gmt":"2026-05-27T11:09:43","guid":{"rendered":"https:\/\/routledgelearning.com\/sustainabilityprinciplesandpractice\/?page_id=312"},"modified":"2026-05-27T11:09:44","modified_gmt":"2026-05-27T11:09:44","slug":"water","status":"publish","type":"page","link":"https:\/\/routledgelearning.com\/sustainabilityprinciplesandpractice\/water\/","title":{"rendered":"Water"},"content":{"rendered":"\n<div class=\"wp-block-buttons is-content-justification-left is-layout-flex wp-container-core-buttons-is-layout-69934ac2 wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link has-base-color has-text-color has-background has-link-color wp-element-button\" href=\"https:\/\/routledgelearning.com\/sustainabilityprinciplesandpractice\/flashcards\/\" style=\"background-color:#409750;font-style:normal;font-weight:300\">Back to all Flashcards<\/a><\/div>\n<\/div>\n\n\n\n<!-- Swiper -->\n<div class=\"swiper mySwiper\">\n    <div class=\"swiper-wrapper\">\n\n        \n        <!-- Swiper Slide -->\n        <div class=\"swiper-slide\">\n          <!-- Flashcard -->\n           <button class=\"flip-card\" role=\"button\" tabindex=\"0\">\n            <div class=\"flip-card-inner\">\n              <div class=\"flip-card-front\"><p><p>aquifer<\/p>\n<\/p><\/div>\n              <div class=\"flip-card-back\"><p>An underground water-bearing layer of permeable rock, sand, or gravel capable of supplying wells or springs.<\/p>\n<\/div>\n            <\/div>\n          <\/button>\n        <\/div>\n\n        \n        <!-- Swiper Slide -->\n        <div class=\"swiper-slide\">\n          <!-- Flashcard -->\n           <button class=\"flip-card\" role=\"button\" tabindex=\"0\">\n            <div class=\"flip-card-inner\">\n              <div class=\"flip-card-front\"><p><p>blackwater<\/p>\n<\/p><\/div>\n              <div class=\"flip-card-back\"><p>Wastewater from toilets, kitchen sinks, and dishwashers.<\/p>\n<\/div>\n            <\/div>\n          <\/button>\n        <\/div>\n\n        \n        <!-- Swiper Slide -->\n        <div class=\"swiper-slide\">\n          <!-- Flashcard -->\n           <button class=\"flip-card\" role=\"button\" tabindex=\"0\">\n            <div class=\"flip-card-inner\">\n              <div class=\"flip-card-front\"><p><p>first flush <\/p>\n<\/p><\/div>\n              <div class=\"flip-card-back\"><p>The initial quantity of water that runs off a surface at the beginning of a rainstorm.<\/p>\n<\/div>\n            <\/div>\n          <\/button>\n        <\/div>\n\n        \n        <!-- Swiper Slide -->\n        <div class=\"swiper-slide\">\n          <!-- Flashcard -->\n           <button class=\"flip-card\" role=\"button\" tabindex=\"0\">\n            <div class=\"flip-card-inner\">\n              <div class=\"flip-card-front\"><p><p>graywater<\/p>\n<\/p><\/div>\n              <div class=\"flip-card-back\"><p>Untreated wastewater collected from bathroom sinks, showers, bathtubs, and clothes washers which has not come into contact with toilet waste.<\/p>\n<\/div>\n            <\/div>\n          <\/button>\n        <\/div>\n\n        \n        <!-- Swiper Slide -->\n        <div class=\"swiper-slide\">\n          <!-- Flashcard -->\n           <button class=\"flip-card\" role=\"button\" tabindex=\"0\">\n            <div class=\"flip-card-inner\">\n              <div class=\"flip-card-front\"><p><p>groundwater<\/p>\n<\/p><\/div>\n              <div class=\"flip-card-back\"><p>Water that has accumulated in saturated soil or rock below the Earth\u2019s surface.<\/p>\n<\/div>\n            <\/div>\n          <\/button>\n        <\/div>\n\n        \n        <!-- Swiper Slide -->\n        <div class=\"swiper-slide\">\n          <!-- Flashcard -->\n           <button class=\"flip-card\" role=\"button\" tabindex=\"0\">\n            <div class=\"flip-card-inner\">\n              <div class=\"flip-card-front\"><p><p>hyporheic zone<\/p>\n<\/p><\/div>\n              <div class=\"flip-card-back\"><p>The subsurface environment below a stream channel.<\/p>\n<\/div>\n            <\/div>\n          <\/button>\n        <\/div>\n\n        \n        <!-- Swiper Slide -->\n        <div class=\"swiper-slide\">\n          <!-- Flashcard -->\n           <button class=\"flip-card\" role=\"button\" tabindex=\"0\">\n            <div class=\"flip-card-inner\">\n              <div class=\"flip-card-front\"><p><p>potable water<\/p>\n<\/p><\/div>\n              <div class=\"flip-card-back\"><p>Water which is suitable for drinking.<\/p>\n<\/div>\n            <\/div>\n          <\/button>\n        <\/div>\n\n        \n        <!-- Swiper Slide -->\n        <div class=\"swiper-slide\">\n          <!-- Flashcard -->\n           <button class=\"flip-card\" role=\"button\" tabindex=\"0\">\n            <div class=\"flip-card-inner\">\n              <div class=\"flip-card-front\"><p><p>rainwater endowment<\/p>\n<\/p><\/div>\n              <div class=\"flip-card-back\"><p>The amount of rainwater which can be captured on a particular site.<\/p>\n<\/div>\n            <\/div>\n          <\/button>\n        <\/div>\n\n        \n        <!-- Swiper Slide -->\n        <div class=\"swiper-slide\">\n          <!-- Flashcard -->\n           <button class=\"flip-card\" role=\"button\" tabindex=\"0\">\n            <div class=\"flip-card-inner\">\n              <div class=\"flip-card-front\"><p><p>rainwater harvesting<\/p>\n<\/p><\/div>\n              <div class=\"flip-card-back\"><p>The process of collecting water that falls as rain and storing it for later use.<\/p>\n<\/div>\n            <\/div>\n          <\/button>\n        <\/div>\n\n        \n        <!-- Swiper Slide -->\n        <div class=\"swiper-slide\">\n          <!-- Flashcard -->\n           <button class=\"flip-card\" role=\"button\" tabindex=\"0\">\n            <div class=\"flip-card-inner\">\n              <div class=\"flip-card-front\"><p><p>residence time<\/p>\n<\/p><\/div>\n              <div class=\"flip-card-back\"><p>The average amount of time that a substance spends in a particular reservoir.<\/p>\n<\/div>\n            <\/div>\n          <\/button>\n        <\/div>\n\n        \n        <!-- Swiper Slide -->\n        <div class=\"swiper-slide\">\n          <!-- Flashcard -->\n           <button class=\"flip-card\" role=\"button\" tabindex=\"0\">\n            <div class=\"flip-card-inner\">\n              <div class=\"flip-card-front\"><p><p>saltwater intrusion<\/p>\n<\/p><\/div>\n              <div class=\"flip-card-back\"><p>The movement of saltwater into freshwater aquifers.<\/p>\n<\/div>\n            <\/div>\n          <\/button>\n        <\/div>\n\n        \n        <!-- Swiper Slide -->\n        <div class=\"swiper-slide\">\n          <!-- Flashcard -->\n           <button class=\"flip-card\" role=\"button\" tabindex=\"0\">\n            <div class=\"flip-card-inner\">\n              <div class=\"flip-card-front\"><p><p>stormwater <\/p>\n<\/p><\/div>\n              <div class=\"flip-card-back\"><p>Water that falls as rain.<\/p>\n<\/div>\n            <\/div>\n          <\/button>\n        <\/div>\n\n        \n        <!-- Swiper Slide -->\n        <div class=\"swiper-slide\">\n          <!-- Flashcard -->\n           <button class=\"flip-card\" role=\"button\" tabindex=\"0\">\n            <div class=\"flip-card-inner\">\n              <div class=\"flip-card-front\"><p><p>virtual water<\/p>\n<\/p><\/div>\n              <div class=\"flip-card-back\"><p>The quantity of water required for the production of food or other goods, measured at the place where they were actually produced.<\/p>\n<\/div>\n            <\/div>\n          <\/button>\n        <\/div>\n\n        \n        <!-- Swiper Slide -->\n        <div class=\"swiper-slide\">\n          <!-- Flashcard -->\n           <button class=\"flip-card\" role=\"button\" tabindex=\"0\">\n            <div 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